ORCID Profile
0000-0002-4009-5070
Current Organisation
Weizmann Institute of Science
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Classical Physics | Classical and Physical Optics | Electrostatics and Electrodynamics | Acoustics and Acoustical Devices; Waves
Publisher: OSA
Date: 2018
Publisher: OSA
Date: 2014
Publisher: American Physical Society (APS)
Date: 24-03-0008
Publisher: Springer Science and Business Media LLC
Date: 16-02-2021
DOI: 10.1038/S41534-021-00372-8
Abstract: We reveal the emergence of quantum Hall phases, topological edge states, spectral Landau levels, and Hofstadter butterfly spectra in the two-particle Hilbert space of an array of periodically spaced two-level atoms coupled to a waveguide (waveguide quantum electrodynamics). While the topological edge states of photons require fine-tuned spatial or temporal modulations of the parameters to generate synthetic magnetic fields and the quantum Hall effect, here we demonstrate that a synthetic magnetic field can be self-induced solely by atom–photon interactions. The fact that topological order can be self-induced in what is arguably the simplest possible quantum structure shows the richness of these waveguide quantum electrodynamics systems. We believe that our findings will advance several research disciplines including quantum optics, many-body physics, and nonlinear topological photonics, and that it will set an important reference point for the future experiments on qubit arrays and quantum simulators.
Publisher: OSA
Date: 2016
Publisher: Wiley
Date: 09-05-2016
Publisher: Wiley
Date: 12-01-2017
Abstract: Recently introduced field of topological photonics aims to explore the concepts of topological insulators for novel phenomena in optics. Here polymeric chains of subwavelength silicon nanodisks are studied and it is demonstrated that these chains can support two types of topological edge modes based on magnetic and electric Mie resonances, and their topological properties are fully dictated by the spatial arrangement of the nanoparticles in the chain. It is observed experimentally and described how theoretically topological phase transitions at the nanoscale define a change from trivial to nontrivial topological states when the edge mode is excited.
Publisher: The Optical Society
Date: 13-11-2017
DOI: 10.1364/OL.42.004724
Publisher: OSA
Date: 2016
Publisher: American Physical Society (APS)
Date: 19-12-2019
Publisher: American Physical Society (APS)
Date: 05-05-2015
Publisher: OSA
Date: 2016
Publisher: IEEE
Date: 07-2017
Publisher: Springer Science and Business Media LLC
Date: 10-08-2015
DOI: 10.1038/SREP12956
Abstract: The Purcell effect is defined as a modification of the spontaneous emission rate of a quantum emitter at the presence of a resonant cavity. However, a change of the emission rate of an emitter caused by an environment has a classical counterpart. Any small antenna tuned to a resonance can be described as an oscillator with radiative losses and the effect of the environment on its radiation can be modeled and measured in terms of the antenna radiation resistance, similar to a quantum emitter. We exploit this analogue behavior to develop a general approach for calculating the Purcell factors of different systems and various frequency ranges including both electric and magnetic Purcell factors. Our approach is illustrated by a general equivalent scheme and it allows resenting the Purcell factor through the continuous radiation of a small antenna at the presence of an electromagnetic environment.
Publisher: American Physical Society (APS)
Date: 05-03-2020
Publisher: American Physical Society (APS)
Date: 04-08-2020
Publisher: American Physical Society (APS)
Date: 24-02-2012
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5NR00231A
Abstract: We report on the first experimental observation of topological edge states in zigzag chains of plasmonic nanodisks.
Publisher: American Physical Society (APS)
Date: 22-02-2021
Publisher: American Physical Society (APS)
Date: 14-11-2013
Publisher: OSA
Date: 2017
Publisher: IEEE
Date: 08-2014
Publisher: IEEE
Date: 07-2017
Publisher: American Chemical Society (ACS)
Date: 27-01-2014
DOI: 10.1021/PH4000949
Publisher: Springer Science and Business Media LLC
Date: 12-01-2018
DOI: 10.1038/LSA.2017.143
Abstract: Integrated photonics is a leading platform for quantum technologies including nonclassical state generation 1, 2, 3, 4 , demonstration of quantum computational complexity 5 and secure quantum communications 6 . As photonic circuits grow in complexity, full quantum tomography becomes impractical, and therefore an efficient method for their characterization 7, 8 is essential. Here we propose and demonstrate a fast, reliable method for reconstructing the two-photon state produced by an arbitrary quadratically nonlinear optical circuit. By establishing a rigorous correspondence between the generated quantum state and classical sum-frequency generation measurements from laser light, we overcome the limitations of previous approaches for lossy multi-mode devices 9, 10 . We applied this protocol to a multi-channel nonlinear waveguide network and measured a 99.28±0.31% fidelity between classical and quantum characterization. This technique enables fast and precise evaluation of nonlinear quantum photonic networks, a crucial step towards complex, large-scale, device production.
Publisher: IOP Publishing
Date: 03-2022
Abstract: We reveal that strongly enhanced generation of photon pairs with narrow frequency spectra and sharp angular correlations can be realised through spontaneous parametric down-conversion in metasurfaces. This is facilitated by creating meta-gratings through nano-structuring of nonlinear films of sub-wavelength thickness to support the extended bound state in the continuum resonances, associated with ultra-high Q -factors, at the biphoton wavelengths across a wide range of emission angles. Such spectral features of photons can be beneficial for various applications, including quantum imaging. Our modelling demonstrates a pronounced enhancement, compared to unpatterned films, of the total photon-pair generation rate normalized to the pump power reaching 1.75 kHz mW −1 , which is robust with respect to the angular bandwidth of the pump, supporting the feasibility of future experimental realisations.
Publisher: SPIE
Date: 05-05-2015
DOI: 10.1117/12.2183280
Publisher: MDPI AG
Date: 22-06-2015
Publisher: OSA
Date: 2016
Publisher: OSA
Date: 2018
Publisher: American Physical Society (APS)
Date: 17-10-2018
Publisher: The Optical Society
Date: 04-11-2019
Publisher: Wiley
Date: 16-11-2016
Start Date: 12-2017
End Date: 11-2021
Amount: $666,204.00
Funder: Australian Research Council
View Funded Activity