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Photon pair generation from lithium niobate metasurface with tunable spatial entanglement[Invited]

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Chinese Optics Letters 2023年第1期21卷 25-31页

作者：张吉化马进勇 dragomir n.neshev Andrey A.Sukhorukov Centre of Excellence for Transformative Meta-Optical Systems(TMOS) Department of Electronic Materials Engineering(EME)Research School of PhysicsThe Australian National UniversityCanberraACT 2601Australia

The two-photon state with spatial entanglement is an essential resource for testing fundamental laws of quantum mechanics and various quantum *** creation typically relies on spontaneous parametric downconversion in bulky nonlinear crystals where the tunability of spatial entanglement is ***,we predict that ultrathin nonlinear lithium niobate metasurfaces can generate and diversely tune spatially entangled photon *** spatial properties of photons including the emission pattern,rate,and degree of spatial entanglement are analyzed theoretically with the coupled mode theory and Schmidt decomposition *** show that by leveraging the strong angular dispersion of the metasurface,the degree of spatial entanglement quantified by the Schmidt number can be decreased or increased by changing the pump laser wavelength and a Gaussian beam *** flexibility can facilitate diverse quantum applications of entangled photon states generated from nonlinear metasurfaces.

关键词： spontaneous parametric downconversion metasurface spatial entanglement

Tuning the second-harmonic generation in AlGaAs nanodimers via non-radiative state optimization [Invited]

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Photonics Research 2018年第5期6卷 I0031-I0037页

作者： DAVIDE Rocco VALERIO F.GILI LAVInIA GHIRARDInI LUCA CARLETTI IVAn FAVERO AnDREA LOCATELLI GIUSEPPE MARInO dragomir n.neshev MICHELE CELEBRAnO MARCO FInAZZI GIUSEPPE LEO COSTAnTInO DE AnGELIS Department of Information Engineering University of BresciaVia Branze 3&Brescia 25123Italy Materiaux et Phenomenes Quantiques Universite Paris DiderotCNRS UMR 716210 rue A.Domon et L.Duquet75013 ParisFrance Department of Physics Politecnico di MilanoPiazza Leonardo Da Vinci 32Milano 20133Italy national Institute of Optics(InO) Via Branze 45Brescia 25123Italy nonlinear Physics Centre Research School of Physics and EngineeringThe Australian National UniversityCanberraACT 2601Australia

Dielectric nanocavities are emerging as a versatile and powerful tool for the linear and nonlinear manipulation of light at the nanoscale. In this work, we exploit the effective coupling of electric and toroidal modes in AIGaAs nanodimers to locally enhance both electric and magnetic fields while minimizing the optical scattering, thereby optimizing their second-harmonic generation efficiency with respect to the case of a single isolated nanodisk. We also demonstrate that proper near-field coupling can provide fitrther degrees of freedom to control the polari- zation state and the radiation diagram of the second-harmonic field.

关键词： Tuning the second-harmonic generation AIGaAs nanodimers via non-radiative state optimization

Broadband infrared imaging governed by guidedmode resonance in dielectric metasurfaces

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Light(Science & Applications) 2024年第11期13卷 2599-2610页

作者： Ze Zheng Daria Smirnova Gabriel Sanderson Ying Cuifeng Demosthenes C.Koutsogeorgis Lujun Huang Zixi Liu Rupert Oulton Arman Yousefi Andrey E.Miroshnichenko dragomir n.neshev Mary O’neill Mohsen Rahmani Lei Xu Advanced Optics and Photonics Laboratory Department of EngineeringSchool of Science&TechnologyNottingham Trent UniversityNottingham NG118NSUK ARC Centre of Excellence for Transformative Meta-Optical Systems(TMOS) Research School of PhysicsThe Australian National UniversityCanberraACT 2601Australia School of Science&Technology Nottingham Trent UniversityNottingham NG118NSUK School of Physics and Electronic Science East China Normal UniversityShanghai 200241China School of Physics Nankai UniversityTianjin 300071China Department of Physics Imperial College LondonLondon SW72BWUK School of Engineering and Technology University of New South WalesCanberraACT 2600Australia

nonlinear metasurfaces have experienced rapid growth recently due to their potential in various applications,including infrared imaging and ***,due to the low conversion efficiencies of metasurfaces,several strategies have been adopted to enhance their performances,including employing resonances at signal or nonlinear emission *** strategy results in a narrow operational band of the nonlinear metasurfaces,which has bottlenecked many applications,including nonlinear holography,image encoding,and nonlinear ***,we overcome this issue by introducing a new nonlinear imaging platform utilizing a pump beam to enhance signal conversion through four-wave mixing(FWM),whereby the metasurface is resonant at the pump wavelength rather than the signal or nonlinear *** a result,we demonstrate broadband nonlinear imaging for arbitrary objects using metasurfaces.A silicon disk-on-slab metasurface is introduced with an excitable guided-mode resonance at the pump *** enabled direct conversion of a broad IR image ranging from>1000 to 4000 nm into ***,adopting FWM substantially reduces the dependence on high-power signal inputs or resonant features at the signal beam of nonlinear imaging by utilizing the quadratic relationship between the pump beam intensity and the signal conversion *** results,therefore,unlock the potential for broadband infrared imaging capabilities with metasurfaces,making a promising advancement for next-generation all-optical infrared imaging techniques with chip-scale photonic devices.

关键词： utilizing resonant governed

Enhanced generation of nondegenerate photon pairs in nonlinear metasurfaces

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Advanced Photonics 2021年第5期3卷 22-27页

作者： Matthew Parry Andrea Mazzanti Alexander Poddubny Giuseppe Della Valle dragomir n.neshev Andrey A.Sukhorukov Australia national University Research School of PhysicsCanberraAustralia ARC Centre of Excellence for Transformative Meta-Optical Systems CanberraAustralia Politecnico di Milano Dipartimento di FisicaMilanItaly ITMO University Department of PhysicsSaint PetersburgRussia Ioffe Institute Saint PetersburgRussia Consiglio nazionale delle Ricerche Istituto di Fotonica e NanotecnologieMilanItaly

We predict theoretically a regime of photon-pair generation driven by the interplay of multiple bound states in the continuum resonances in nonlinear *** nondegenerate photon-pair generation is derived from the hyperbolic topology of the transverse phase matching and can enable orders-of-magnitude enhancement of the photon rate and spectral brightness,as compared to the degenerate *** show through comprehensive simulations that the entanglement of the photon pairs can be tuned by varying the pump polarization,which can underpin future advances and applications of ultracompact quantum light sources.

关键词： optics photonics light metasurface spontaneous parametric down-conversion entanglement

Giant ultrafast dichroism and birefringence with active nonlocal metasurfaces

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Light(Science & Applications) 2024年第10期13卷 2240-2250页

作者： Giulia Crotti Mert Akturk Andrea Schirato Vincent Vinel Anton A.Trifonov Ivan C.Buchvarov dragomir n.neshev Remo Proietti Zaccaria Paolo Laporta Aristide Lemaître Giuseppe Leo Giulio Cerullo Margherita Maiuri Giuseppe Della Valle Department of Physics Politecnico di Milano20133 MilanoItaly Istituto Italiano di Tecnologia 16163 GenovaItaly Laboratoire Matériaux et Phénomènes Quantiques(MPQ) UniversitéParis Cité&CNRS75013 ParisFrance John Atanasoff Center for Bio and nano Photonics(JAC BnP) 1164 SofiaBulgaria Department of Physics St.Kliment Ohridski University of Sofia5 James Bourchier Boulevard1164 SofiaBulgaria ARC Centre of Excellence for Transformative Meta-Optical Systems(TMOS) Research School of PhysicsAustralian National UniversityActonACT 2601Australia. Cixi Institute of Biomedical Engineering Ningbo Institute of Industrial TechnologyChinese Academy of SciencesNingbo 315201China. Istituto di Fotonica e nanotecnologie(IFn) Consiglio Nazionale delle Ricerche20133 MilanoItaly. UniversitéParis-Saclay CNRSCentre de Nanosciences et de Nanotechnologies10 Boulevard Thomas Gobert91120 PalaiseauFrance Institut Universitaire de France(IUF) ParisFrance

Switching of light polarization on the sub-picosecond timescale is a crucial functionality for applications in a variety of contexts,including telecommunications,biology and *** ability to control polarization at ultrafast speed would pave the way for the development of unprecedented free-space optical links and of novel techniques for probing dynamical processes in complex systems,as chiral *** high switching speeds can only be reached with an all-optical paradigm,i.e.,engineering active platforms capable of controlling light polarization via ultrashort laser *** we demonstrate giant modulation of dichroism and birefringence in an all-dielectric metasurface,achieved at low fluences of the optical control *** performance,which leverages the many degrees of freedom offered by all-dielectric active metasurfaces,is obtained by combining a high-quality factor nonlocal resonance with the giant third-order optical nonlinearity dictated by photogenerated hot carriers at the semiconductor band edge.

关键词： dielectric surfaces nonlinearity

nonlinear integrated photonics

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Photonics Research 2018年第5期6卷 I0024-I0025页

作者： ERIC CASSAn CHRISTIAn GRILLET dragomir n.neshev DAVID J.MOSS Centre for nanosciences and nanotechnologies (C2n) Paris-Sud University CnRS Senior research fellow continuing position Institut des Nanotechnologies de Lyon (INL)Ecole centrale de Lyon nonlinear Physics Centre Australian National University Director of the Center for Micro-Photonics (CMP) Swinburne University of Technology

The field of nonlinear photonics is in full development. This special issue of Photonics Research takes you through the current issues of this fast-growing field of research, drawing on the current state of the art an... 详细信息

关键词： nonlinear integrated photonics full development

Third-harmonic generation and imaging with resonant Si membrane metasurface

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Opto-Electronic Advances 2023年第8期6卷 18-27页

作者： Ze Zheng Lei Xu Lujun Huang Daria Smirnova Khosro Zangeneh Kamali Arman Yousefi Fu Deng Rocio Camacho-Morales Cuifeng Ying Andrey E.Miroshnichenko dragomir n.neshev Mohsen Rahmani Advanced Optics and Photonics Laboratory Department of EngineeringSchool of Science&TechnologyNottingham Trent UniversityNottingham NG118NSUK School of Engineering and Information Technology University of New South WalesCanberra ACT 2600Australia School of Physics and Electronic Science East China Normal UniversityShanghai 200241China ARC Centre of Excellence for Transformative Meta-Optical Systems(TMOS) Research School of PhysicsAustralian National UniversityCanberra ACT 2601Australia Department of Physics Hong Kong University of Science and TechnologyKowloonHong Kong SAR 999077China

Dielectric metasurfaces play an increasingly important role in enhancing optical nonlinear generations owing to their ability to support strong light-matter interactions based on Mie-type multipolar *** to metasurfaces composed of the periodic arrangement of nanoparticles,inverse,so-called,membrane metasurfaces offer unique possibilities for supporting multipolar resonances,while maintaining small unit cell size,large mode volume and high field enhancement for enhancing nonlinear frequency ***,we theoretically and experimentally investigate the formation of bound states in the continuum(BICs)from silicon dimer-hole membrane *** demonstrate that our BIC-formed resonance features a strong and tailorable electric near-field confinement inside the silicon membrane ***,we show that by tuning the gap between the holes,one can open a leaky channel to transform these regular BICs into quasi-BICs,which can be excited directly under normal plane wave *** prove the capabilities of such metasurfaces,we demonstrate the conversion of an infrared image to the visible range,based on the Third-harmonic generation(THG)process with the resonant membrane *** results suggest a new paradigm for realising efficient nonlinear photonics metadevices and hold promise for extending the applications of nonlinear structuring surfaces to new types of all-optical near-infrared imaging technologies.

关键词： nonlinear imaging third-harmonic generation bound states in the continuum membrane metasurfaces

Enhanced light-matter interactions in dielectric nanostructures via machine-learning approach

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Advanced Photonics 2020年第2期2卷 57-67页

作者： Lei Xu Mohsen Rahmani Yixuan Ma Daria ASmirnova Khosro Zangeneh Kamali Fu Deng Yan Kei Chiang Lujun Huang Haoyang Zhang Stephen Gould dragomir n.neshev Andrey E.Miroshnichenko University of new South Wales School of Engineering and Information TechnologyCanberraAustralia nottingham Trent University School of Science&TechnologyDepartment of EngineeringAdvanced Optics and Photonics LaboratoryNottinghamUnited Kingdom Australian national University Research School of PhysicsNonlinear Physics CentreCanberraAustralia Australian national University Research School of PhysicsARC Centre of Excellence for Transformative Meta-Optical Systems(TMOS)CanberraAustralia Queensland University of Technology School of Electrical Engineering and Computer ScienceBrisbaneQueenslandAustralia Australian national University College of Engineering and Computer ScienceCanberraAustralia

A key concept underlying the specific functionalities of metasurfaces is the use of constituent components to shape the wavefront of the light on *** are versatile,novel platforms for manipulating the scattering,color,phase,or intensity of ***,one of the typical approaches for designing a metasurface is to optimize one or two variables among a vast number of fixed parameters,such as various materials’properties and coupling effects,as well as the geometrical ***,this would require multidimensional space optimization through direct numerical ***,an alternative,popular approach allows for reducing the computational cost significantly based on a deep-learning-assisted *** utilize a deep-learning approach for obtaining high-quality factor(high-Q)resonances with desired characteristics,such as linewidth,amplitude,and spectral *** exploit such high-Q resonances for enhancedlight–matter interaction in nonlinearoptical metasurfaces and optomechanical vibrations,*** demonstrate that optimized metasurfaces achieve up to 400-fold enhancement of the third-harmonic generation;at the same time,they also contribute to 100-fold enhancement of the amplitude of optomechanical *** approach can be further used to realize structures with unconventional scattering responses.

关键词： machine learning dielectric nanostructures Fano resonance third-harmonic generation optoacoustics

Infrared upconversion imaging in nonlinear metasurfaces

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Advanced Photonics 2021年第3期3卷 83-92页

作者： Rocio Camacho-Morales Davide Rocco Lei Xu Valerio Flavio Gili nikolay Dimitrov Lyubomir Stoyanov Zhonghua Ma Andrei Komar Mykhaylo Lysevych Fouad Karouta Alexander Dreischuh Hark Hoe Tan Giuseppe Leo Costantino De Angelis Chennupati Jagadish Andrey E.Miroshnichenko Mohsen Rahmani dragomir n.neshev The Australian national University Research School of PhysicsARC Centre of Excellence for Transformative Meta-Optical SystemsDepartment of Electronic Materials EngineeringCanberraACTAustralia University of Brescia Department of Information EngineeringBresciaItaly University of new South Wales School of Engineering and Information TechnologyCanberraACTAustralia nottingham Trent University School of Science and TechnologyAdvanced Optics and Photonics LaboratoryDepartment of EngineeringNottinghamUnited Kingdom UniversitéParis Diderot Matériaux et Phénomènes QuantiquesParisFrance Friedrich Schiller University Jena Institute of Applied PhysicsAbbe Center of PhotonicsJenaGermany Sofia University Department of Quantum ElectronicsFaculty of PhysicsSofiaBulgaria

Infrared imaging is a crucial technique in a multitude of applications,including night vision,autonomous vehicle navigation,optical tomography,and food quality *** infrared imaging technologies,however,require the use of materials such as narrow bandgap semiconductors,which are sensitive to thermal noise and often require cryogenic *** demonstrate a compact all-optical alternative to perform infrared imaging in a metasurface composed of GaAs semiconductor nanoantennas,using a nonlinear wave-mixing *** experimentally show the upconversion of short-wave infrared wavelengths via the coherent parametric process of sum-frequency *** this process,an infrared image of a target is mixed inside the metasurface with a strong pump beam,translating the image from the infrared to the visible in a nanoscale ultrathin imaging *** results open up new opportunities for the development of compact infrared imaging devices with applications in infrared vision and life sciences.

关键词： metasurfaces nonlinear optical processes infrared photonics imaging.