ORCID Profile
0000-0002-9391-2468
Current Organisations
Université Paris Diderot
,
University of Queensland
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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)
Nanotechnology | Nanofabrication, Growth and Self Assembly | Quantum Information, Computation and Communication | Nanoelectromechanical Systems | Quantum Optics | Nanophotonics
ANZSRC Socio-Economic Objective (SEO)
Expanding Knowledge in Technology | Integrated Circuits and Devices | Satellite Navigation Equipment | Expanding Knowledge in the Physical Sciences |
Related Links
Publications
Optomechanics with Superfluid Helium-4
Publisher: OSA
Date: 2015
Photoelastic coupling in gallium arsenide optomechanical disk resonators
Publisher: The Optical Society
Date: 02-06-2014
DOI: 10.1364/OE.22.014072
Microphotonic Forces from Superfluid Flow
Publisher: American Physical Society (APS)
Date: 29-04-2016
Tunneling of Transverse Acoustic Waves on a Silicon Chip
Publisher: American Physical Society (APS)
Date: 17-06-2025
Critical optical coupling between a GaAs disk and a nanowaveguide suspended on the chip
Publisher: AIP Publishing
Date: 10-10-2011
DOI: 10.1063/1.3651493
Abstract: We report on an integrated GaAs disk/waveguide system. A millimeter-long waveguide is suspended and tapered on the chip over a length of 25 μm to evanescently couple to high Q optical whispering gallery modes of a GaAs disk. The critical coupling regime is obtained both by varying the disk/guide gap distance and the width of the suspended nanoscale taper. Experimental results are in good agreement with predictions from coupled mode theory.
Injection locking of an electro-optomechanical device
Publisher: The Optical Society
Date: 29-09-2017
Proposal for a quantum traveling Brillouin resonator
Publisher: Optica Publishing Group
Date: 14-07-2020
DOI: 10.1364/OE.397478
Abstract: Brillouin systems operating in the quantum regime have recently been identified as a valuable tool for quantum information technologies and fundamental science. However, reaching the quantum regime is extraordinarily challenging, owing to the stringent requirements of combining low thermal occupation with low optical and mechanical dissipation, and large coherent phonon-photon interactions. Here, we propose an on-chip liquid based Brillouin system that is predicted to exhibit large phonon-photon coupling with exceptionally low acoustic dissipation. The system is comprised of a silicon-based “slot” waveguide filled with superfluid helium. This type of waveguide supports optical and acoustical traveling waves, strongly confining both fields into a subwavelength-scale mode volume. It serves as the foundation of an on-chip traveling wave Brillouin resonator with an electrostrictive single photon optomechanical coupling rate exceeding 240 kHz. Such devices may enable applications ranging from ultra-sensitive superfluid-based gyroscopes, to non-reciprocal optical circuits. Furthermore, this platform opens up new possibilities to explore quantum fluid dynamics in a strongly interacting condensate.
Gallium Arsenide Disk Optomechanical Resonators
Publisher: Jenny Stanford Publishing
Date: 06-10-2014
DOI: 10.1201/B17366-12
Strong optical coupling through superfluid Brillouin lasing
Publisher: Springer Science and Business Media LLC
Date: 10-02-2020
Extreme quantum nonlinearity in superfluid thin-film surface waves
Publisher: Springer Science and Business Media LLC
Date: 21-04-2021
DOI: 10.1038/S41534-021-00393-3
Abstract: We show that highly confined superfluid films are extremely nonlinear mechanical resonators, offering the prospect to realize a mechanical qubit. Specifically, we consider third-sound surface waves, with nonlinearities introduced by the van der Waals interaction with the substrate. Confining these waves to a disk, we derive analytic expressions for the cubic and quartic nonlinearities and determine the resonance frequency shifts they introduce. We predict single-phonon shifts that are three orders of magnitude larger than in current state-of-the-art nonlinear resonators. Combined with the exquisitely low intrinsic dissipation of superfluid helium and the strongly suppressed acoustic radiation loss in phononic crystal cavities, we predict that this could allow blockade interactions between phonons as well as two-level-system-like behavior. Our work provides a pathway towards extreme mechanical nonlinearities, and towards quantum devices that use mechanical resonators as qubits.
Scalable high-precision tuning of photonic resonators by resonant cavity-enhanced photoelectrochemical etching
Publisher: Springer Science and Business Media LLC
Date: 24-01-2017
DOI: 10.1038/NCOMMS14267
Abstract: Photonic lattices of mutually interacting indistinguishable cavities represent a cornerstone of collective phenomena in optics and could become important in advanced sensing or communication devices. The disorder induced by fabrication technologies has so far hindered the development of such resonant cavity architectures, while post-fabrication tuning methods have been limited by complexity and poor scalability. Here we present a new simple and scalable tuning method for ensembles of microphotonic and nanophotonic resonators, which enables their permanent collective spectral alignment. The method introduces an approach of cavity-enhanced photoelectrochemical etching in a fluid, a resonant process triggered by sub-bandgap light that allows for high selectivity and precision. The technique is presented on a gallium arsenide nanophotonic platform and illustrated by finely tuning one, two and up to five resonators. It opens the way to applications requiring large networks of identical resonators and their spectral referencing to external etalons.
Damping of optomechanical disks resonators vibrating in air
Publisher: AIP Publishing
Date: 11-06-2012
DOI: 10.1063/1.4729014
Propagation and Imaging of Mechanical Waves in a Highly Stressed Single-Mode Acoustic Waveguide
Publisher: American Physical Society (APS)
Date: 14-06-2019
Wavelength-sized GaAs optomechanical resonators with gigahertz frequency
Publisher: AIP Publishing
Date: 14-03-2011
DOI: 10.1063/1.3563711
Abstract: We report on wavelength-sized GaAs optomechanical disk resonators showing ultrastrong optomechanical interaction. We observe optical transduction of a disk mechanical breathing mode with 1.4 GHz frequency and effective mass of ∼2 pg. The measured vacuum optomechanical coupling rate reaches g0=0.8 MHz, with a related differential optomechanical coupling factor gom=485 GHz/nm. The disk Brownian motion is optically resolved with a sensitivity of 10−17 m/√Hz at room temperature and pressure.
High Frequency GaAs Nano-Optomechanical Disk Resonator
Publisher: American Physical Society (APS)
Date: 23-12-2010
Improved optomechanical disk resonator sitting on a pedestal mechanical shield
Publisher: IOP Publishing
Date: 04-02-2015
Inertial Injection Locking in an Electro-optomechanical System
Publisher: OSA
Date: 2017
Publisher’s Note: “Wavelength-sized GaAs optomechanical resonators with gigahertz frequency” [Appl. Phys. Lett. 98, 113108 (2011)]
Publisher: AIP Publishing
Date: 18-04-2011
DOI: 10.1063/1.3582912
High bandwidth on-chip capacitive tuning of microtoroid resonators
Publisher: The Optical Society
Date: 26-08-2016
DOI: 10.1364/OE.24.020400
Non-linear Optomechanical Resonators based on Gallium Arsenide
Publisher: OSA
Date: 2013
Cryogenic and hermetically sealed packaging of photonic chips for optomechanics
Publisher: Optica Publishing Group
Date: 08-08-2022
DOI: 10.1364/OE.463752
Abstract: We demonstrate a hermetically sealed packaging system for integrated photonic devices at cryogenic temperatures with plug-and-play functionality. This approach provides the ability to encapsulate a controlled amount of gas into the optical package allowing helium to be used as a heat-exchange gas to thermalize photonic devices, or condensed into a superfluid covering the device. This packaging system was tested using a silicon-on-insulator slot waveguide resonator which fills with superfluid 4 He below the transition temperature. To optimize the fiber-to-chip optical integration 690 tests were performed by thermally cycling optical fibers bonded to various common photonic chip substrates (silicon, silicon oxide and HSQ) with a range of glues (NOA 61, NOA 68, NOA 88, NOA 86H and superglue). This showed that NOA 86H (a UV curing optical adhesive with a latent heat catalyst) provided the best performance under cryogenic conditions for all the substrates tested. The technique is relevant to superfluid optomechanics experiments, as well as quantum photonics and quantum optomechanics applications.
Engineered entropic forces allow ultrastrong dynamical backaction
Publisher: American Association for the Advancement of Science (AAAS)
Date: 24-05-2023
Abstract: When confined within an optical cavity light can exert strong radiation pressure forces. Combined with dynamical backaction, this enables important processes, such as laser cooling, and applications ranging from precision sensors to quantum memories and interfaces. However, the magnitude of radiation pressure forces is constrained by the energy mismatch between photons and phonons. Here, we overcome this barrier using entropic forces arising from the absorption of light. We show that entropic forces can exceed the radiation pressure force by eight orders of magnitude and demonstrate this using a superfluid helium third-sound resonator. We develop a framework to engineer the dynamical backaction from entropic forces, applying it to achieve phonon lasing with a threshold three orders of magnitude lower than previous work. Our results present a pathway to exploit entropic forces in quantum devices and to study nonlinear fluid phenomena such as turbulence and solitons.
Nano-optomechanical disk resonators operating in liquids for sensing applications
Publisher: IEEE
Date: 2016
Optical instability and self-pulsing in silicon nitride whispering gallery resonators
Publisher: The Optical Society
Date: 14-12-2012
DOI: 10.1364/OE.20.029076
Light-Mediated Cascaded Locking of Multiple Nano-Optomechanical Oscillators
Publisher: American Physical Society (APS)
Date: 09-02-2017
Free spectral range electrical tuning of a high quality on-chip microcavity
Publisher: The Optical Society
Date: 10-12-2018
DOI: 10.1364/OE.26.033649
Coherent vortex dynamics in a strongly interacting superfluid on a silicon chip
Publisher: American Association for the Advancement of Science (AAAS)
Date: 20-12-2019
Abstract: When stirred, superfluids react by creating quantized vortices. Studying the dynamics of these vortices, especially in the strongly interacting regime, is technically challenging. Sachkou et al. developed a technique for the nondestructive tracking of vortices in thin films of superfluid helium-4. Their system contained a microtoroid optical cavity coated by a thin film of helium-4, in which vortices were created by using laser light. When imaging the subsequent dynamics of the vortices, the researchers found that coherent dynamics strongly dominated over dissipation. Science , this issue p. 1480
Precision measurement: Sensing past the quantum limit
Publisher: Springer Science and Business Media LLC
Date: 07-2017
DOI: 10.1038/547164A
High-frequency nano-optomechanical disk resonators in liquids
Publisher: Springer Science and Business Media LLC
Date: 03-08-2015
Abstract: Nano- and micromechanical resonators are the subject of research that aims to develop ultrasensitive mass sensors for spectrometry, chemical analysis and biomedical diagnosis. Unfortunately, their merits generally diminish in liquids because of an increased dissipation. The development of faster and lighter miniaturized devices would enable improved performances, provided the dissipation was controlled and novel techniques were available to drive and readout their minute displacement. Here we report a nano-optomechanical approach to this problem using miniature semiconductor disks. These devices combine a mechanical motion at high frequencies (gigahertz and above) with an ultralow mass (picograms) and a moderate dissipation in liquids. We show that high-sensitivity optical measurements allow their Brownian vibrations to be resolved directly, even in the most-dissipative liquids. We investigate their interaction with liquids of arbitrary properties, and analyse measurements in light of new models. Nano-optomechanical disks emerge as probes of rheological information of unprecedented sensitivity and speed, which opens up applications in sensing and fundamental science.
Origin of optical losses in gallium arsenide disk whispering gallery resonators
Publisher: The Optical Society
Date: 22-07-2015
DOI: 10.1364/OE.23.019656
Laser cooling and control of excitations in superfluid helium
Publisher: Springer Science and Business Media LLC
Date: 04-04-2016
DOI: 10.1038/NPHYS3714
Electro-Optomechanical Modulation Instability in a Semiconductor Resonator
Publisher: American Physical Society (APS)
Date: 17-06-2021
Ultrahigh Q-frequency product for optomechanical disk resonators with a mechanical shield
Publisher: AIP Publishing
Date: 09-12-2013
DOI: 10.1063/1.4846515
Abstract: We report on optomechanical GaAs disk resonators with ultrahigh quality factor-frequency product Q×f. Disks standing on a simple pedestal exhibit GHz mechanical breathing modes attaining a Q×f of 1013 measured under vacuum at cryogenic temperature. Cl ing losses are found to be the dominant source of dissipation. An improved disk resonator geometry integrating a shield within the pedestal is then proposed, and its working principles and performances are investigated by numerical simulations. For dimensions compatible with fabrication constraints, the cl ing-loss-limited Q reaches 107–109 corresponding to Q×f equals 1016–1018. This shielded pedestal approach applies to any heterostructure presenting an acoustic mismatch.
Modelling of vorticity, sound and their interaction in two-dimensional superfluids
Publisher: IOP Publishing
Date: 05-2019
Abstract: Vorticity in two-dimensional superfluids is subject to intense research efforts due to its role in quantum turbulence, dissipation and the BKT phase transition. Interaction of sound and vortices is of broad importance in Bose–Einstein condensates and superfluid helium. However, both the modelling of the vortex flow field and of its interaction with sound are complicated hydrodynamic problems, with analytic solutions only available in special cases. In this work, we develop methods to compute both the vortex and sound flow fields in an arbitrary two-dimensional domain. Further, we analyse the dispersive interaction of vortices with sound modes in a two-dimensional superfluid and develop a model that quantifies this interaction for any vortex distribution on any two-dimensional bounded domain, possibly non-simply connected, exploiting analogies with fluid dynamics of an ideal gas and electrostatics. As an ex le application we use this technique to propose an experiment that should be able to unambiguously detect single circulation quanta in a helium thin film.
Theoretical framework for thin film superfluid optomechanics: towards the quantum regime
Publisher: IOP Publishing
Date: 22-12-2016
Related Organisations
Related Funding Activities
Discovery Early Career Researcher Award - Grant ID: DE190100318
Start Date: 07-2019
End Date: 07-2024
Amount: $368,554.00
Funder: Australian Research Council
View Funded ActivityLinkage Projects - Grant ID: LP190101159
Start Date: 11-2020
End Date: 11-2025
Amount: $780,917.00
Funder: Australian Research Council
View Funded ActivityLinkage Projects - Grant ID: LP160101616
Start Date: 11-2017
End Date: 11-2020
Amount: $334,710.00
Funder: Australian Research Council
View Funded Activity