ORCID Profile
0000-0002-6262-1959
Current Organisation
RMIT University
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Research Topics
In Research Link Australia (RLA), "Research Topics" refer to ANZSRC FOR and SEO codes. These topics are either sourced from ANZSRC FOR and SEO codes listed in researchers' related grants or generated by a large language model (LLM) based on their publications.
Top 5 Research Topics
ANZSRC Field of Research (FoR)
Nanomaterials | Materials engineering | Catalysis and Mechanisms of Reactions | Functional Materials | Functional materials | Nanotechnology not elsewhere classified | Materials Engineering
ANZSRC Socio-Economic Objective (SEO)
Hydrogen Production from Renewable Energy | Expanding Knowledge in the Chemical Sciences | Expanding Knowledge in Engineering |
Related Links
Publications
Triggering a Self-Sustaining Reduction of Graphenes Oxide for High-Performance Energy Storage Devices
Publisher: American Chemical Society (ACS)
Date: 19-08-2020
Graphene oxide thin films for functional photonic devices
Publisher: OSA
Date: 2016
On-Demand Design of Tunable Complete Photonic Band Gaps based on Bloch Mode Analysis
Publisher: Springer Science and Business Media LLC
Date: 24-09-2018
DOI: 10.1038/S41598-018-32422-1
Abstract: The fundamental property of photonic crystals is the band gap effect, which arises from the periodic dielectric modulation of electromagnetic waves and plays an indispensable role in manipulating light. Ever since the first photonic-bandgap structure was discovered, the ability to tune its bandgap across a wide wavelength range has been highly desirable. Therefore, obtaining photonic crystals possessing large on-demand bandgaps has been an ever-attractive study but has remained a challenge. Here we present an analytical design method for achieving high-order two-dimensional photonic crystals with tunable photonic band gaps on-demand. Based on the Bloch mode analysis for periodic structures, we are able to determine the geometric structure of the unit cell that will realize a nearly optimal photonic band gap for one polarization between the appointed adjacent bands. More importantly, this method generates a complete bandgap for all polarizations, with frequencies tuned by the number of photonic bands below the gap. The lowest dielectric contrast needed to generate a photonic band gap, as well as conditions for generating complete bandgaps, are investigated. Our work first highlights the systematic approach to complete photonic band gaps design based on Bloch mode analysis. The physical principles behind our work are then generalized to other photonic lattices.
Tailoring reduction extent of flash-reduced graphene oxides for high performance supercapacitors
Publisher: Elsevier BV
Date: 12-2020
A hexagonal boron nitride super self-collimator for optical asymmetric transmission in the visible region
Publisher: Elsevier BV
Date: 02-2021
Chemical Stabilization of 1T′ Phase Transition Metal Dichalcogenides with Giant Optical Kerr Nonlinearity
Publisher: American Chemical Society (ACS)
Date: 03-02-2017
DOI: 10.1021/JACS.6B13238
Abstract: The 2H-to-1T' phase transition in transition metal dichalcogenides (TMDs) has been exploited to phase-engineer TMDs for applications in which the metallicity of the 1T' phase is beneficial. However, phase-engineered 1T'-TMDs are metastable thus, stabilization of the 1T' phase remains an important challenge to overcome before its properties can be exploited. Herein, we performed a systematic study of the 2H-to-1T' phase evolution by lithiation in ultrahigh vacuum. We discovered that by hydrogenating the intercalated Li to form lithium hydride (LiH), unprecedented long-term (>3 months) air stability of the 1T' phase can be achieved. Most importantly, this passivation method has wide applicability for other alkali metals and TMDs. Density functional theory calculations reveal that LiH is a good electron donor and stabilizes the 1T' phase against 2H conversion, aided by the formation of a greatly enhanced interlayer dipole-dipole interaction. Nonlinear optical studies reveal that air-stable 1T'-TMDs exhibit much stronger optical Kerr nonlinearity and higher optical transparency than the 2H phase, which is promising for nonlinear photonic applications.
Resilient Graphene Ultrathin Flat Lens in Aerospace, Chemical, and Biological Harsh Environments
Publisher: American Chemical Society (ACS)
Date: 07-05-2019
Abstract: The development of ultrathin flat lenses has revolutionized the lens technologies and holds great promise for miniaturizing the conventional lens system in integrated photonic applications. In certain applications, the lenses are required to operate in harsh and/or extreme environments, for ex le aerospace, chemical, and biological environments. Under such circumstances, it is critical that the ultrathin flat lenses can be resilient and preserve their outstanding performance. However, the majority of the demonstrated ultrathin flat lenses are based on metal or semiconductor materials that have poor chemical, thermal, and UV stability, which limit their applications. Herein, we experimentally demonstrate a graphene ultrathin flat lens that can be applied in harsh environments for different applications, including a low Earth orbit space environment, strong corrosive chemical environments (pH = 0 and pH = 14), and biochemical environment. The graphene lenses have extraordinary environmental stability and can maintain a high level of structural integrity and outstanding focusing performance under different test conditions. Thus, it opens tremendous practical application opportunities for ultrathin flat lenses.
Free-standing graphene oxide mid-infrared polarizers
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0NR01619E
Abstract: Mid-infrared free-standing graphene oxide polarizers with working wavelengths from 2 μm to 14 μm, and an extinction ratio of 20 dB.
All-angle negative refraction flatlens with a broad bandwidth
Publisher: Elsevier BV
Date: 11-2017
Polarization of excitation light influences molecule counting in single-molecule localization microscopy
Publisher: Springer Science and Business Media LLC
Date: 03-09-2014
DOI: 10.1007/S00418-014-1267-1
Abstract: Single-molecule localization microscopy has been widely applied to count the number of biological molecules within a certain structure. The percentage of molecules that are detected significantly affects the interpretation of data. Among many factors that affect this percentage, the polarization state of the excitation light is often neglected or at least unstated in publications. We demonstrate by simulation and experiment that the number of molecules detected can be different from -40 up to 100% when using circularly or linearly polarized excitation light. This is determined mainly by the number of photons emitted by single fluorescent molecule, namely the choice of fluorescence proteins, and the background noise in the system, namely the illumination scheme. This difference can be further exaggerated or mitigated by various fixation methods, magnification, and camera settings We conclude that the final choice between circularly or linearly polarized excitation light should be made experimentally, based on the signal to noise ratio of the system.
Revealing solvent-dependent folding behavior of mycolic acids from Mycobacterium tuberculosis by advanced simulation analysis
Publisher: Springer Science and Business Media LLC
Date: 14-02-2019
A broadband polarization-insensitive on-chip reciprocal asymmetric transmission device based on generalized total reflection principle
Publisher: IOP Publishing
Date: 24-08-2018
Tailoring mechanical and electrical properties of graphene oxide film for structural dielectric capacitors
Publisher: Elsevier BV
Date: 2021
Topology optimization of photonic structures for all-angle negative refraction
Publisher: Elsevier BV
Date: 09-2016
All-optical vectorial control of multistate magnetization through anisotropy-mediated spin-orbit coupling
Publisher: Walter de Gruyter GmbH
Date: 26-09-2019
Abstract: The interplay between light and magnetism is considered as a promising solution to fully steer multidimensional magnetic oscillations/vectors, facilitating the development of all-optical multilevel recording/memory technologies. To date, impressive progress in multistate magnetization instead of a binary level has been witnessed by primarily resorting to double laser beam excitation. Yet, the control mechanisms are limited to specific magnetic medium or intricate optical configuration as well as overlooking the crystallographic architecture of the media and the polarization-phase linkage of the light fields. Here, we theoretically present a novel all-optical strategy for generating arbitrary multistate magnetization through the inverse Faraday effect. This is achieved by strongly focusing a single vortex-phase configured beam with circular polarization onto the anisotropic magnetic medium. By judiciously tuning the topological charge effect, the optical anisotropic effect, and the anisotropic optomagnetic effect, the light-induced magnetic vector can be flexibly redistributed between its transverse and longitudinal components, thus enabling orientation-unlimited multilevel magnetization control. In this optomagnetic process, we also reveal the role of anisotropy-mediated spin-orbit coupling, another physical mechanism that enables the effective translation of the angular momentum of light fields to the magnetic system. Furthermore, the conceptual paradigm of all-optical multistate magnetization is verified. Our findings show great prospect in multidimensional high-density optomagnetic recording and memory devices and also in high-speed information processing science and technology.
Two-dimensional Phononic Crystal Design with Large Band Gaps
Publisher: OSA
Date: 2017
Photonic crystal with 2-fold rotational symmetry for highly efficient asymmetric transmission
Publisher: Elsevier BV
Date: 12-2020
Creation of diffraction-limited non-Airy multifocal arrays using a spatially shifted vortex beam
Publisher: AIP Publishing
Date: 25-02-2013
DOI: 10.1063/1.4794030
Abstract: Diffraction-limited non-Airy multifocal arrays are created by focusing a phase-modulated vortex beam through a high numerical-aperture objective. The modulated phase at the back aperture of the objective resulting from the superposition of two concentric phase-modulated vortex beams allows for the generation of a multifocal array of cylindrically polarized non-Airy patterns. Furthermore, we shift the spatial positions of the phase vortices to manipulate the intensity distribution at each focal spot, leading to the creation of a multifocal array of split-ring patterns. Our method is experimentally validated by generating the predicted phase modulation through a spatial light modulator. Consequently, the spatially shifted circularly polarized vortex beam adopted in a dynamic laser direct writing system facilitates the fabrication of a split-ring microstructure array in a polymer material by a single exposure of a femtosecond laser beam.
Diffraction-Limited Imaging with a Graphene Metalens*
Publisher: IOP Publishing
Date: 10-2020
DOI: 10.1088/0256-307X/37/10/106801
Abstract: Planar graphene metalens has demonstrated advantages of ultrathin thickness (200 nm), high focusing resolution (343 nm) and efficiency ( %) and robust mechanical strength and flexibility. However, diffraction-limited imaging with such a graphene metalens has not been realized, which holds the key to designing practical integrated imaging systems. In this work, the imaging rule for graphene metalenses is first derived and theoretically verified by using the Rayleigh-Sommerfeld diffraction theory to simulate the imaging performance of the 200 nm ultrathin graphene metalens. The imaging rule is applicable to graphene metalenses in different immersion media, including water or oil. Based on the theoretical prediction, high-resolution imaging using the graphene metalens with diffraction-limited resolution (500 nm) is demonstrated for the first time. This work opens the possibility for graphene metalenses to be applied in particle tracking, microfluidic chips and biomedical devices.
Optimization of ionic-liquid based electrolyte concentration for high-energy density graphene supercapacitors
Publisher: Elsevier BV
Date: 03-2020
A critical review on multifunctional composites as structural capacitors for energy storage
Publisher: Elsevier BV
Date: 03-2018
Graphene-based layered metamaterial platform for functional photonic devices
Publisher: OSA
Date: 2019
Graphene Multilayer Photonic Metamaterials: Fundamentals and Applications
Publisher: Wiley
Date: 03-03-2021
Enhancement of LED light extraction via diffraction of hexagonal lattice fabricated in ITO layer with holographic lithography and wet etching
Publisher: Elsevier BV
Date: 05-2008
Two-photon reduction: a cost-effective method for fabrication of functional metallic nanostructures
Publisher: Springer Science and Business Media LLC
Date: 13-01-2017
Boosting the electrical and mechanical properties of structural dielectric capacitor composites via gold nanoparticle doping
Publisher: Elsevier BV
Date: 12-2019
Graphene-Based Multilayered Metamaterials with Phototunable Architecture for on-Chip Photonic Devices
Publisher: American Chemical Society (ACS)
Date: 27-02-2019
Fundamental Transport Mechanisms and Advancements of Graphene Oxide Membranes for Molecular Separation
Publisher: American Chemical Society (ACS)
Date: 06-03-2019
Spectroscopic Studies on the Interaction of Metallic Ions with an Imidazolyl-Phenolic System
Publisher: Springer Science and Business Media LLC
Date: 23-05-2016
DOI: 10.1007/S10895-016-1828-X
Abstract: A fluorescent imidazolyl-phenolic compound was applied on the detection of metallic species (Cu(2+), Al(3+), Cr(3+) and Fe(3+)) in a CH3CN/H2O (95/5, v/v) media. The presence and concentration of these cations altered significantly the emission profile of the probe, mainly lowering the signal intensity at 466 nm, while a new emission band around 395 nm appeared (for the trivalent ions). These results were rationalized as a combination of collisional quenching (KSV in the 10(3)-10(4) L mol(-1) range) and formation of a coordinated compound. The later disrupts the Excited State Intramolecular Proton Transfer that regulates the keto-enol tautomerism originally present on the free probe. Since the quenching efficiency and the obtained emission profiles are drastically different for Cu(2+) and Fe(3+) ions, this allows their differential recognition.
Hybrid anisotropic plasmonic metasurfaces with multiple resonances of focused light beams
Publisher: American Chemical Society (ACS)
Date: 30-08-2021
Achieving Large Band Gaps in 2D Symmetric and Asymmetric Photonic Crystals
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 05-2017
Ultrahigh heating rate induced micro-explosive production of graphene for energy storage
Publisher: Elsevier BV
Date: 12-2019
Asymmetric transmission of light waves in a photonic crystal waveguide heterostructure with complete bandgaps
Publisher: Optica Publishing Group
Date: 07-05-2020
DOI: 10.1364/AO.387331
Abstract: Here, we theoretically present an on-chip nanophotonic asymmetric transmission device (ATD) based on the photonic crystal (PhC) waveguide structure with complete photonic bandgaps (CPBGs). The ATD comprises two-dimensional silica and germanium PhCs with CPBGs, within which line defects are introduced to create highly efficient waveguides to achieve high forward transmittance. In the meantime, the total internal reflection principle is applied to block the backward incidence, achieving asymmetric transmission. We optimize the design of the PhCs and the waveguide structure by scanning different structure parameters. The optimized ATD shows a high forward transmittance of 0.581 and contrast ratio of 0.989 at the wavelength of 1582 nm for TE mode. The results deepen the understanding and open up the new possibility in designing novel ATDs. The on-chip ATD will find broad applications in optical communications and quantum computing.
Multifunctional graphene oxide paper embodied structural dielectric capacitor based on carbon fibre reinforced composites
Publisher: Elsevier BV
Date: 07-2018
Multicenter Clinical Investigation of a New Active Osseointegrated Steady-State Implant System.
Publisher: Ovid Technologies (Wolters Kluwer Health)
Date: 17-08-2020
DOI: 10.1097/MAO.0000000000002794
Abstract: A new active transcutaneous bone conduction hearing implant system that uses piezoelectric technology has been developed: an active osseointegrated steady-state implant system (OSI). This was the first clinical investigation undertaken to demonstrate clinical performance, safety, and benefit of the new implant system. A multicenter prospective within-subject clinical investigation was conducted. Fifty-one adult subjects with mixed and conductive hearing loss (MHL/CHL, n = 37) and single-sided sensorineural deafness (SSD, n = 14) were included. Audiological evaluations included audiometric thresholds, speech recognition in noise, and quiet. Hearing and health-related patient-reported outcomes (PROs health utilities index [HUI], abbreviated profile of hearing aid benefit [APHAB], and speech, spatial of qualities of hearing scale [SSQ]), daily use, surgical and safety parameters were collected. Intra- and postoperative complications were few. One implant was removed before activation due to post-surgical infection. Compared with the preoperative softband tests, a significant improvement in speech recognition-in-noise was observed in the MHL/CHL group (–7.3 dB, p ≤ 0.0001) and the SSD group (–8.1 dB, p = 0.0008). In quiet, word recognition improved in the MHL/CHL group, most markedly at lower intensity input of 50 dB SPL (26.7%, p ≤ 0.0001). The results of all PROs showed a significant improvement with the new device compared with preoperative softband in the MHL/CHL group. In the SSD group significant improvements were observed in the APHAB and SSQ questionnaires. The results confirmed the clinical safety, performance, and benefit of this new treatment modality for subjects with CHL, MHL, and SSD.
Nanogratings and nanoholes fabricated by direct femtosecond laser writing in chalcogenide glasses
Publisher: Optica Publishing Group
Date: 18-03-2010
DOI: 10.1364/OE.18.006885
Graphene Metamaterial for High Absorption of Unpolarized Light over More Than Three Octaves of Bandwidth
Publisher: IEEE
Date: 06-2019
Tuning the properties of flash-reduced graphene oxide electrodes for supercapacitor applications
Publisher: SPIE
Date: 31-12-2019
DOI: 10.1117/12.2543097
Fabrication of Two-Dimensional Photonic Crystals on N-Type Silicon Substrate Using Holographic and Wet Etching Techniques
Publisher: ASMEDC
Date: 2007
Abstract: Technique of fabricating two-dimensional (2D) photonic crystals (PCs) in silicon wafers using the combination of holographic lithography and wet etching is described in the paper. The fabricated silicon material is suitable to be used as porous silicon for Ge/Si quantum dots growth or other applications. Single exposure holographic method was adopted to fabricate the photoresist mask with the pattern of 2D hexagonal lattice structure. HF:HNO3:CH3COOH = 4:4:3 solution was used to etch circular pores with bowl-shaped bottom into silicon substrate at room temperature with 30 s etching time. Periodic structure in silicon with 1 μm lattice constant and 200 nm pore depth was obtained in the experiment. The fabrication process is fast and cost-effective thus having the potential for industrial mass production of porous silicon.
Map-based cloning identifies velvet A as a critical component of virulence in Fusarium pseudograminearum during infection of wheat heads
Publisher: Elsevier BV
Date: 03-2021
Plasmonic nanostructures in photodetection, energy conversion and beyond
Publisher: Walter de Gruyter GmbH
Date: 29-06-2020
Abstract: This review article aims to provide a comprehensive understanding of plasmonic nanostructures and their applications, especially on the integration of plasmonic nanostructures into devices. Over the past decades, plasmonic nanostructures and their applications have been intensively studied because of their outstanding features at the nanoscale. The fundamental characteristics of plasmonic nanostructures, in particular, the electric field enhancement, the generation of hot electrons, and thermoplasmonic effects, play essential roles in most of the practical applications. In general, these three main characteristics of plasmonic nanostructures occur concomitantly when electromagnetic waves interact with plasmonic nanostructures. However, comprehensive review investigating these three main effects of plasmonic nanostructures simultaneously remains elusive. In this article, the fundamental characteristics of plasmonic nanostructures are discussed, especially the interactions between electromagnetic waves and plasmonic nanostructures that lead to the change in near-field electric fields, the conversion of photon energy into hot electrons through plasmon decay, and the photothermal effects at the nanoscale. The applications, challenges faced in these three areas and the future trends are also discussed. This article will provide guidance towards integration of plasmonic nanostructures for functional devices for both academic researchers and engineers in the fields of silicon photonics, photodetection, sensing, and energy harvesting.
Femtosecond laser fabricated ultra-flat lens in a graphene oxide thin film
Publisher: OSA
Date: 2014
Dynamic control of magnetization spot arrays with three-dimensional orientations
Publisher: Optica Publishing Group
Date: 05-01-2021
DOI: 10.1364/OE.412260
Abstract: We report a new paradigm for achieving magnetization spot arrays with controllable three-dimensional (3D) orientations. Toward this aim, we subtly design a tailored incident beam containing three parts and further demonstrate that the designed incident beam is phase-modulated radial polarization. Based on the raytracing model under tight focusing condition and the inverse Faraday effect on the magneto-optic (MO) film, the magnetization field components along the y -axis and z -axis directions are generated through the focus. In particular, we are able to garner orientation-tunable 3D magnetization under different numerical apertures of the focusing objectives by adjusting the ratios between the three parts of incident beam. Apart from a single magnetization spot, magnetization spot arrays capable of dynamically controlling 3D orientation in each spot can also be achieved by multi-zone plate (MZP) phase filter. Such a robust magnetization pattern is attributed to not only the constructive interferences of three orthogonal focal field components, but also the position translation of each magnetization spot resulting from shifting phase of the MZP phase filter. It is expected that the research outcomes can be beneficial to spintronics, magnetic encryption and multi-value MO parallelized storage.
Tunable Thermochromic Graphene Metamaterials with Iridescent Color
Publisher: American Chemical Society (ACS)
Date: 31-05-2022
DOI: 10.1021/ACS.NANOLETT.1C04768
Abstract: Thermochromic materials have been widely applied in energy-efficient buildings, aerospace, textiles, and sensors. Conventional thermochromic materials rely on material phase or structure changes upon thermal stimuli, which only enable a few colors, greatly limiting their applicability. Here, we propose and demonstrate the concept of dynamically tunable thermochromic graphene metamaterials (TGMs), which can achieve continuous color tunability (380-800 nm) with fast (<100 ms) response times. The TGMs are composed of an ultrathin graphene oxide (GO) film on a flexible metal substrate. We demonstrated that external thermal energy can dynamically adjust the water contents in the GO film to manipulate the color of TGMs. An impressive thermochromic sensitivity of 1.11 nm/°C covering a large percentage of the color space has been achieved. Prototype applications for a cup and smartphone have been demonstrated. The reversible TGMs promise great potential for practical applications of temperature sensing in optoelectronic devices, environmental monitoring, and dynamic color modulation.
A highly efficient asymmetric transmission device for arbitrary linearly polarized light
Publisher: Elsevier BV
Date: 09-2020
Three-dimensional super-resolution longitudinal magnetization spot arrays
Publisher: Springer Science and Business Media LLC
Date: 03-2017
DOI: 10.1038/LSA.2017.32
Public involvement in suicide prevention: understanding and strengthening lay responses to distress
Publisher: Springer Science and Business Media LLC
Date: 23-08-2009
Tailoring pores in graphene-based materials: from generation to applications
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7TA04692H
Abstract: Combining the merits from both porous material and graphene, porous graphene-based materials have received significant attention due to their unique porous structures, large surface areas and prominent electrical conductivity.
Laser fabricated ultrathin flat lens in sub-nanometer thick monolayer transition metal dichalcogenides crystal
Publisher: OSA
Date: 2016
Dynamic generation of Debye diffraction-limited multifocal arrays for direct laser printing nanofabrication
Publisher: The Optical Society
Date: 31-01-2011
DOI: 10.1364/OL.36.000406
Epoxy-gold nanoparticle nanocomposites with enhanced thermo-mechanical properties: An integrated modelling and experimental study
Publisher: Elsevier BV
Date: 04-2019
Graphene oxide thin film structural dielectric capacitors for aviation static electricity harvesting and storage
Publisher: Elsevier BV
Date: 11-2020
Design of a structural power composite using graphene oxide as a dielectric material layer
Publisher: Elsevier BV
Date: 04-2018
The potential utility of GATA binding protein 3 for diagnosis of malignant pleural mesotheliomas
Publisher: Elsevier BV
Date: 11-2020
Full-Stokes Polarization Perfect Absorption with Diatomic Metasurfaces
Publisher: American Chemical Society (ACS)
Date: 13-01-2021
Highly efficient and ultra-broadband graphene oxide ultrathin lenses with three-dimensional subwavelength focusing
Publisher: Springer Science and Business Media LLC
Date: 22-09-2015
DOI: 10.1038/NCOMMS9433
Abstract: Nanometric flat lenses with three-dimensional subwavelength focusing are indispensable in miniaturized optical systems. However, they are fundamentally challenging to achieve because of the difficulties in accurately controlling the optical wavefront by a film with nanometric thickness. Based on the unique and giant refractive index and absorption modulations of the sprayable graphene oxide thin film during its laser reduction process, we demonstrate a graphene oxide ultrathin (∼200 nm) flat lens that shows far-field three-dimensional subwavelength focusing ( λ 3 /5) with an absolute focusing efficiency of % for a broad wavelength range from 400 to 1,500 nm. Our flexible graphene oxide lenses are mechanically robust and maintain excellent focusing properties under high stress. The simple and scalable fabrication approach enables wide potential applications in on-chip nanophotonics. The wavefront shaping concept opens up new avenues for easily accessible, highly precise and efficient optical beam manipulations with a flexible and integratable planar graphene oxide ultrathin film.
Functional graphene metamaterials by femtosecond laser reduction
Publisher: MDPI
Date: 21-07-2017
Flat Lenses Based on 2D Perovskite Nanosheets
Publisher: Wiley
Date: 10-06-2020
Polarisation multiphoton multifocal microscopy
Publisher: OSA
Date: 2013
Generation of an axially super-resolved quasi-spherical focal spot using an amplitude-modulated radially polarized beam
Publisher: The Optical Society
Date: 22-06-2011
DOI: 10.1364/OL.36.002471
Three-dimensional parallel recording with a Debye diffraction-limited and aberration-free volumetric multifocal array
Publisher: The Optical Society
Date: 13-03-2014
DOI: 10.1364/OL.39.001621
Radiative cooling: Fundamental physics, atmospheric influences, materials and structural engineering, applications and beyond
Publisher: Elsevier BV
Date: 02-2021
Diffraction-limited imaging with monolayer 2D material-based ultrathin flat lenses
Publisher: Springer Science and Business Media LLC
Date: 11-08-2020
DOI: 10.1038/S41377-020-00374-9
Abstract: Ultrathin flat optics allow control of light at the subwavelength scale that is unmatched by traditional refractive optics. To approach the atomically thin limit, the use of 2D materials is an attractive possibility due to their high refractive indices. However, achievement of diffraction-limited focusing and imaging is challenged by their thickness-limited spatial resolution and focusing efficiency. Here we report a universal method to transform 2D monolayers into ultrathin flat lenses. Femtosecond laser direct writing was applied to generate local scattering media inside a monolayer, which overcomes the longstanding challenge of obtaining sufficient phase or litude modulation in atomically thin 2D materials. We achieved highly efficient 3D focusing with subwavelength resolution and diffraction-limited imaging. The high focusing performance even allows diffraction-limited imaging at different focal positions with varying magnifications. Our work paves the way for downscaling of optical devices using 2D materials and reports an unprecedented approach for fabricating ultrathin imaging devices.
A fiber tip graphene oxide lens towards fiber optic endoscope application
Publisher: OSA
Date: 2019
Tunable graphene metamaterial for advanced photonic devices
Publisher: SPIE
Date: 12-03-2020
DOI: 10.1117/12.2550168
Nitroimidazopyrazinones with Oral Activity against Tuberculosis and Chagas Disease in Mouse Models of Infection
Publisher: American Chemical Society (ACS)
Date: 16-09-2022
DOI: 10.1021/ACS.JMEDCHEM.2C00972
Abstract: Tuberculosis and parasitic infections continue to impose a significant threat to global public health and economic growth. There is an urgent need to develop new treatments to combat these diseases. Here, we report the
Design of broadband all-dielectric valley photonic crystals at telecommunication wavelength
Publisher: Elsevier BV
Date: 06-2021
Engineering van der Waals Materials for Advanced Metaphotonics
Publisher: American Chemical Society (ACS)
Date: 24-06-2022
DOI: 10.1021/ACS.CHEMREV.2C00048
Abstract: The outstanding chemical and physical properties of 2D materials, together with their atomically thin nature, make them ideal candidates for metaphotonic device integration and construction, which requires deep subwavelength light-matter interaction to achieve optical functionalities beyond conventional optical phenomena observed in naturally available materials. In addition to their intrinsic properties, the possibility to further manipulate the properties of 2D materials via chemical or physical engineering dramatically enhances their capability, evoking new science on light-matter interaction, leading to leaped performance of existing functional devices and giving birth to new metaphotonic devices that were unattainable previously. Comprehensive understanding of the intrinsic properties of 2D materials, approaches and capabilities for chemical and physical engineering methods, the resulting property modifications and novel functionalities, and applications of metaphotonic devices are provided in this review. Through reviewing the detailed progress in each aspect and the state-of-the-art achievement, insightful analyses of the outstanding challenges and future directions are elucidated in this cross-disciplinary comprehensive review with the aim to provide an overall development picture in the field of 2D material metaphotonics and promote rapid progress in this fast emerging and prosperous field.
On-Chip Ultra-Compact Hexagonal Boron Nitride Topological Ring-Resonator in Visible Region
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 12-2022
Graphene metalens for particle nanotracking
Publisher: Optica Publishing Group
Date: 15-07-2020
DOI: 10.1364/PRJ.397262
Abstract: Particle nanotracking (PNT) is highly desirable in lab-on-a-chip systems for flexible and convenient multiparameter measurement. An ultrathin flat lens is the preferred imaging device in such a system, with the advantage of high focusing performance and compactness. However, PNT using ultrathin flat lenses has not been demonstrated so far because PNT requires the clear knowledge of the relationship between the object and image in the imaging system. Such a relationship still remains elusive in ultrathin flat lens-based imaging systems because they operate based on diffraction rather than refraction. In this paper, we experimentally reveal the imaging relationship of a graphene metalens using nanohole arrays with micrometer spacing. The distance relationship between the object and image as well as the magnification ratio is acquired with nanometer accuracy. The measured imaging relationship agrees well with the theoretical prediction and is expected to be applicable to other ultrathin flat lenses based on the diffraction principle. By analyzing the high-resolution images from the graphene metalens using the imaging relationship, 3D trajectories of particles with high position accuracy in PNT have been achieved. The revealed imaging relationship for metalenses is essential in designing different types of integrated optical systems, including digital cameras, microfluidic devices, virtual reality devices, telescopes, and eyeglasses, and thus will find broad applications.
Single-shot production of Janus graphene thin film for solar steam generation with 94.5% efficiency
Publisher: Elsevier BV
Date: 10-2022
Anisotropic Third-Order Nonlinearity in Pristine and Lithium Hydride Intercalated Black Phosphorus
Publisher: American Chemical Society (ACS)
Date: 07-11-2018
Structured graphene metamaterial selective absorbers for high efficiency and omnidirectional solar thermal energy conversion
Publisher: Springer Science and Business Media LLC
Date: 13-03-2020
DOI: 10.1038/S41467-020-15116-Z
Abstract: An ideal solar-thermal absorber requires efficient selective absorption with a tunable bandwidth, excellent thermal conductivity and stability, and a simple structure for effective solar thermal energy conversion. Despite various solar absorbers having been demonstrated, these conditions are challenging to achieve simultaneously using conventional materials and structures. Here, we propose and demonstrate three-dimensional structured graphene metamaterial (SGM) that takes advantages of wavelength selectivity from metallic trench-like structures and broadband dispersionless nature and excellent thermal conductivity from the ultrathin graphene metamaterial film. The SGM absorbers exhibit superior solar selective and omnidirectional absorption, flexible tunability of wavelength selective absorption, excellent photothermal performance, and high thermal stability. Impressive solar-to-thermal conversion efficiency of 90.1% and solar-to-vapor efficiency of 96.2% have been achieved. These superior properties of the SGM absorber suggest it has a great potential for practical applications of solar thermal energy harvesting and manipulation.
Light-limited photosynthesis under energy-saving film decreases eggplant yield
Publisher: Wiley
Date: 29-08-2020
DOI: 10.1002/FES3.245
Five-fold plasmonic Fano resonances with giant bisignate circular dichroism
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8NR05277H
Abstract: Chiral metamaterials with versatile designs can exhibit orders of magnitude enhancement in chiroptical responses compared with that of the natural chiral media.
Role of Surface Recombination in Halide Perovskite Nanoplatelets
Publisher: American Chemical Society (ACS)
Date: 27-08-2018
Ultrafast direct laser writing of 2D materials for multifunctional photonics devices [Invited]
Publisher: Shanghai Institute of Optics and Fine Mechanics
Date: 2020
Two-dimensional material functional devices enabled by direct laser fabrication
Publisher: Springer Science and Business Media LLC
Date: 12-12-2017
Three-dimensional nanoconfinement of broadband optical energy in all-dielectric photonic nanostructure
Publisher: The Optical Society
Date: 30-09-2013
DOI: 10.1364/PRJ.1.000136
An on-chip nanophotonic reciprocal optical diode for asymmetric transmission of the circularly polarized light
Publisher: Elsevier BV
Date: 08-2019
Parallel multiphoton microscopy with cylindrically polarized multifocal arrays
Publisher: The Optical Society
Date: 11-09-2013
DOI: 10.1364/OL.38.003627
Two-Dimensional CH3NH3PbI3 Perovskite Nanosheets for Ultrafast Pulsed Fiber Lasers
Publisher: American Chemical Society (ACS)
Date: 29-03-2017
Abstract: Even though the nonlinear optical effects of solution processed organic-inorganic perovskite films have been studied, the nonlinear optical properties in two-dimensional (2D) perovskites, especially their applications for ultrafast photonics, are largely unexplored. In comparison to bulk perovskite films, 2D perovskite nanosheets with small thicknesses of a few unit cells are more suitable for investigating the intrinsic nonlinear optical properties because bulk recombination of photocarriers and the nonlinear scattering are relatively small. In this research, we systematically investigated the nonlinear optical properties of 2D perovskite nanosheets derived from a combined solution process and vapor phase conversion method. It was found that 2D perovskite nanosheets have stronger saturable absorption properties with large modulation depth and very low saturation intensity compared with those of bulk perovskite films. Using an all dry transfer method, we constructed a new type of saturable absorber device based on single piece 2D perovskite nanosheet. Stable soliton state mode-locking was achieved, and ultrafast picosecond pulses were generated at 1064 nm. This work is likely to pave the way for ultrafast photonic and optoelectronic applications based on 2D perovskites.
Towards enhanced energy density of graphene-based supercapacitors: Current status, approaches, and future directions
Publisher: Elsevier BV
Date: 08-2018
Enhancement of external quantum efficiency of LEDs by fabricating photonic crystal in ITO p-contact layer
Publisher: SPIE
Date: 29-11-2007
DOI: 10.1117/12.755710
A 90-nm-thick graphene metamaterial for strong and extremely broadband absorption of unpolarized light
Publisher: Springer Science and Business Media LLC
Date: 18-03-2019
Complete absorption of broadband, unpolarized light in a deep-subwavelength graphene metamaterial
Publisher: OSA
Date: 2017
Imaging rule of diffractive ultrathin flat lens
Publisher: SPIE
Date: 12-03-2020
DOI: 10.1117/12.2542420
Broadband graphene oxide anti-reflection coating on silicon nanostructures
Publisher: OSA
Date: 2017
Fast Parallel Fabrication of Three-dimensional Photonic Crystals Using the Dynamic Laser Printing Technique
Publisher: OSA
Date: 2010
Graphene Metamaterial 3D Conformal Coating for Enhanced Light Harvesting
Publisher: American Chemical Society (ACS)
Date: 19-12-2022
Integrated Wavelength Beam Emitter on Silicon for Two-Dimensional Optical Scanning
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 12-2019
Optimization of lattice constants of 2D photonic crystals fabricated on ITO layers of LEDs using holographic method for efficient light extraction
Publisher: SPIE
Date: 07-05-2009
DOI: 10.1117/12.820139
Laser trimming of graphene oxide for functional photonic applications
Publisher: IOP Publishing
Date: 23-01-2017
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ARC Future Fellowships - Grant ID: FT220100559
Start Date: 2023
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