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Nanophotonics shines light on hyperbolic metamaterials

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Light(Science & Applications) 2022年第2期11卷 145-148页

作者： Andreas Aigner Judith M.Dawes stefan a.maier Haoran Ren Chair in Hybrid Nanosystems Nanoinstitute MunichFaculty of PhysicsLudwig-Maximilians-University MunichMunich 80539Germany MQ Photonics Research Centre Department of Physics and AstronomyMacquarie UniversityMacquarie ParkNSW 2109Australia.3Department of PhysicsImperial College LondonLondon SW72AZUK 不详

Hyperbolic metamaterials with a unique hyperbolic dispersion relation allow propagating waves with infinitely largewavevectors and a high density of states. Researchers from Korea and Singapore provide a comprehensive review ofhyperbolic metamaterials, including artificially structured hyperbolic media and natural hyperbolic materials. Theyexplain key nanophotonic concepts and describe a range of applications for these versatile materials.

关键词： materials. hyperbolic infinitely

Ultrahigh numerical aperture meta-fibre for flexible optical trapping

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Light(Science & Applications) 2021年第4期10卷 589-599页

作者： Malte Plidschun Haoran Ren Jisoo Kim Ronny Forster stefan a.maier Markus A.Schmidt Leibniz Institute of Photonic Technology 07745 JenaGermany Abbe Center of Photonics and Faculty of Physics FSU Jena07745 JenaGermany Chair in Hybrid Nanosystems Nanoinstitute MunichLMU Munchen80539 MunchenGermany Department of Physics Imperial College LondonLondon SW72AZUK Otto Schott Institute of Material Research FSU Jena07745 JenaGermany

Strong focusing on diffraction-limited spots is essential for many photonic applications and is particularly relevant for optical trapping;however,all currently used approaches fail to simultaneously provide flexible transportation of light,straightforward implementation,compatibility with waveguide circuitry,and strong ***,we demonstrate the design and 3D nanoprinting of an ultrahigh numerical aperture meta-fibre for highly flexible optical *** into account the peculiarities of the fibre environment,we implemented an ultrathin meta-lens on the facet of a modified single-mode optical fibre via direct laser writing,leading to a diffraction-limited focal spot with a recordhigh numerical aperture of up to NA≈*** unique capabilities of this flexible,cost-effective,bio-and fibre-circuitrycompatible meta-fibre device were demonstrated by optically trapping microbeads and bacteria for the first time with only one single-mode fibre in combination with diffractive *** study highlights the relevance of the unexplored but exciting field of meta-fibre optics to a multitude of fields,such as bioanalytics,quantum technology and life sciences.

关键词： optical waveguide fibre

Radiative suppression of exciton-exciton annihilation in a two-dimensional semiconductor

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Light(Science & Applications) 2023年第9期12卷 1911-1920页

作者： Luca Sortino Merve Gülmüs Benjamin Tilmann Leonardo de S.Menezes stefan a.maier Chair in Hybrid Nanosystems Nanoinstitute MunichFaculty of PhysicsLudwig-Maximilians-Universität München80539 MunichGermany Center for NanoScience Faculty of PhysicsLudwig-Maximilians-Universität München80539 MunichGermany Departamento de Física Universidade Federal de Pernambuco50670-901 Recife-PEBrazil School of Physics and Astronomy Monash UniversityClaytonVIC 3800Australia The Blackett Laboratory Department of PhysicsImperial College LondonLondon SW72BWUK

Two-dimensional(2D)semiconductors possess strongly bound excitons,opening novel opportunities for engineering light-matter interaction at the ***,their in-plane confinement leads to large non-radiative exciton–exciton annihilation(EEA)processes,setting a fundamental limit for their photonic *** this work,we demonstrate suppression of EEA via enhancement of light-matter interaction in hybrid 2D semiconductor-dielectric nanophotonic platforms,by coupling excitons in WS2 monolayers with optical Mie resonances in dielectric *** hybrid system reaches an intermediate light-matter coupling regime,with photoluminescence enhancement factors up to *** the exciton ultrafast dynamics reveal suppressed EEA for coupled excitons,even under high exciton densities>10^(12)cm^(−2).We extract EEA coefficients in the order of 10^(−3),compared to 10^(−2)for uncoupled monolayers,as well as a Purcell factor of *** results highlight engineering the photonic environment as a route to achieve higher quantum efficiencies,for low-power hybrid devices,and larger exciton densities,towards strongly correlated excitonic phases in 2D semiconductors.

关键词： annihilation dielectric coupling

Single-step-fabricated disordered metasurfaces for enhanced light extraction from LEDs

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Light(Science & Applications) 2021年第10期10卷 1840-1848页

作者： Peng Mao Changxu Liu Xiyan Li Mengxia Liu Qiang Chen Min Han stefan a.maier Edward H.Sargent Shuang Zhang School of Physics and Astronomy University of BirminghamB152TT BirminghamUK National Laboratory of Solid State Microstructures College of Engineering and Applied Sciencesand Collaborative Innovation Centre of Advanced MicrostructuresNanjing UniversityNanjing 210093China Chair in Hybrid Nanosystems Nanoinstitute MunichFaculty of PhysicsLudwigMaximilians-Universitaet Muenchen80539 MuenchenGermany Department of Electrical and Computer Engineering University of Toronto35 St.George StreetTorontoON M5S 1A4Canada Key Laboratory of Intelligent Optical Sensing and Manipulation(Nanjing University) Ministry of EducationNanjingChina Department of Physics Imperial College LondonLondon SW72AZUK Department of Physics University of Hong KongHong Kong 999077China Department of Electrical and Electronic Engineering University of Hong KongHong Kong 999077China

While total internal reflection(TIR)lays the foundation for many important applications,foremost fibre optics that revolutionised information technologies,it is undesirable in some other applications such as light-emitting diodes(LEDs),which are a backbone for energy-efficient light *** the case of LEDs,TIR prevents photons from escaping the constituent high-index *** in material science have led to good efficiencies in generating photons from electron–hole pairs,making light extraction the bottleneck of the overall efficiency of *** recent years,the extraction efficiency has been improved,using nanostructures at the semiconductor/air interface that outcouple trapped photons to the outside ***,the design of geometrical features for light extraction with sizes comparable to or smaller than the optical wavelength always requires sophisticated and timeconsuming fabrication,which causes a gap between lab demonstration and industrial-level *** by lightning bugs,we propose and realise a disordered metasurface for light extraction throughout the visible spectrum,achieved with single-step *** applying such a cost-effective light extraction layer,we improve the external quantum efficiency by a factor of 1.65 for commercialised GaN LEDs,demonstrating a substantial potential for global energy-saving and sustainability.

关键词： light backbone consuming

Single-emitter super-resolved imaging of radiative decay rate enhancement in dielectric gap nanoantennas

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Light(Science & Applications) 2024年第1期13卷 47-54页

作者： R.Margoth Córdova-Castro Bart van Dam Alberto Lauri stefan a.maier Riccardo Sapienza Yannick De Wilde Ignacio Izeddin Valentina Krachmalnicoff Institut Langevin ESPCI ParisPSL UniversityCNRSParisFrance The Blackett Laboratory Department of PhysicsImperial College LondonLondonUK School of Physics and Astronomy Monash UniversityClaytonVictoriaAustralia Chair in Hybrid Nanosystems Ludwig-Maximilians Universität MünchenMuenchenGermany Department of Physics University of OttawaOttawaONCanada

High refractive index dielectric nanoantennas strongly modify the decay rate via the Purcell effect through the design of radiative *** to their dielectric nature,the field is mainly confined inside the nanostructure and in the gap,which is hard to probe with scanning probe *** we use single-molecule fluorescence lifetime imaging microscopy(smFLIM)to map the decay rate enhancement in dielectric GaP nanoantenna dimers with a median localization precision of 14 *** measure,in the gap of the nanoantenna,decay rates that are almost 30 times larger than on a glass *** comparing experimental results with numerical simulations we show that this large enhancement is essentially radiative,contrary to the case of plasmonic nanoantennas,and therefore has great potential for applications such as quantum optics and biosensing.

关键词： dielectric decay radiative

Coherent interaction of atoms with a beam of light confined in a light cage

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Light(Science & Applications) 2021年第7期10卷 1247-1256页

作者： Flavie Davidson-Marquis Julian Gargiulo Esteban Gómez-López Bumjoon Jang Tim Kroh Chris Müller Mario Ziegler stefan a.maier Harald Kübler Markus A.Schmidt Oliver Benson Department of Physics and IRIS Adlershof Humboldt-Universität zu Berlin12489 BerlinGermany Chair in Hybrid Nanosystems Nanoinstitute MunichFaculty of PhysicsLudwig-Maximilians-Universität München80539 MunichGermany Department of Fiber Photonics Leibniz Institute of Photonic Technology07745 JenaGermany Competence Center for Micro-and Nanotechnologies Leibniz Institute of Photonic Technology Jena07745 JenaGermany Department of Physics Imperial College LondonLondon SW72AZUK Physikalisches Institut and Center for Integrated Quantum Science and Technology University of StuttgartPfaffenwaldring 5770569 StuttgartGermany Otto Schott Institute of Material Research 07743 JenaGermany

Controlling coherent interaction between optical fields and quantum systems in scalable,integrated platforms is essential for quantum ***,warm alkali-vapour cells integrated with on-chip photonic devices represent an attractive system,in particular for delay or storage of a single-photon quantum ***-core fibres or planar waveguides are widely used to confine light over long distances enhancing light-matter interaction in atomic-vapour ***,they suffer from inefficient filling times,enhanced dephasing for atoms near the surfaces,and limited light-matter *** report here on the observation of modified electromagnetically induced transparency for a non-diffractive beam of light in an on-chip,laterally-accessible hollow-core light *** layer deposition of an alumina nanofilm onto the light-cage structure was utilised to precisely tune the high-transmission spectral region of the light-cage mode to the operation wavelength of the atomic transition,while additionally protecting the polymer against the corrosive alkali *** experiments show strong,coherent light-matter coupling over lengths substantially exceeding the Rayleigh ***,the stable non-degrading performance and extreme versatility of the light cage provide an excellent basis for a manifold of quantum-storage and quantumnonlinear applications,highlighting it as a compelling candidate for all-on-chip,integrable,low-cost,vapour-based photon delay.

关键词： vapour interaction quantum

Unlocking the out-of-plane dimension for photonic bound states in the continuum to achieve maximum optical chirality

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Light(Science & Applications) 2023年第11期12卷 2423-2433页

作者： Lucca Kühner Fedja J.Wendisch Alexander A.Antonov Johannes Bürger Ludwig Hüttenhofer Leonardo de S.Menezes stefan a.maier Maxim V.Gorkunov Yuri Kivshar Andreas Tittl Chair in Hybrid Nanosystems Nanoinstitute Munichand Center for NanoScienceFaculty of PhysicsLudwig-Maximilians-University MunichKöniginstrasse 1080539 MünchenGermany Shubnikov Institute of Crystallography FSRC“Crystallography and Photonics”Russian Academy of SciencesMoscow 119333Russia Departamento de Física Universidade Federal de Pernambuco50670-901 RecifePernambucoBrazil School of Physics and Astronomy Monash UniversityWellington RdClaytonVIC 3800Australia The Blackett Laboratory Department of PhysicsImperial College LondonLondon SW72AZUK Nonlinear Physics Centre Research School of PhysicsAustralian National UniversityCanberraACT 2601Australia

The realization of lossless metasurfaces with true chirality crucially requires the fabrication of three-dimensional structures,constraining experimental feasibility and hampering practical *** though the threedimensional assembly of metallic nanostructures has been demonstrated previously,the resulting plasmonic resonances suffer from high intrinsic and radiative *** concept of photonic bound states in the continuum(BICs)is instrumental for tailoring radiative losses in diverse geometries,especially when implemented using lossless dielectrics,but applications have so far been limited to planar ***,we introduce a novel nanofabrication approach to unlock the height of individual resonators within all-dielectric metasurfaces as an accessible parameter for the efficient control of resonance features and nanophotonic *** particular,we realize out-of-plane symmetry breaking in quasi-BIC metasurfaces and leverage this design degree of freedom to demonstrate an optical all-dielectric quasi-BIC metasurface with maximum intrinsic chirality that responds selectively to light of a particular circular polarization depending on the structural *** experimental results not only open a new paradigm for all-dielectric BICs and chiral nanophotonics,but also promise advances in the realization of efficient generation of optical angular momentum,holographic metasurfaces,and parity-time symmetry-broken optical systems.

关键词： dielectric symmetry realization

High-Q collective Mie resonances in monocrystalline silicon nanoantenna arrays for the visible light

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Fundamental Research 2023年第5期3卷 822-830页

作者： Zhenghe Zhang Pengbo Liu Wanli Lu Ping Bai Bingchang Zhang Zefeng Chen stefan a.maier Jaime Gómez Rivas Shaojun Wang Xiaofeng Li School of Optoelectronic Science and Engineering&Collaborative Innovation Center of Suzhou Nano Science and Technology Soochow UniversitySuzhou 215006China Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province&Key Lab of Modern Optical Technologies of Education Ministry of China Soochow UniversitySuzhou 215006China School of Materials Science and Physics China University of Mining and TechnologyXuzhou 221116China Department of Applied Physics and Institute for Photonic Integration Eindhoven University of Technology5612 AE EindhovenThe Netherlands School of Physics and Astronomy Monash UniversityClaytonVictoria 3800Australia Department of Physics Imperial College LondonLondon SW72AZUK Chair in Hybrid Nanosystems Nanointitute MunichFaculty of PhysicsLudwig-Maximilians Universitaet MuenchenMuenchen 80539Germany

Dielectric optical antennas have emerged as a promising nanophotonic architecture for manipulating the propagation and localization of ***,the optically induced Mie resonances in an isolated nanoantenna are normally with broad spectra and poor𝑄-factors,limiting their performances in sensing,lasing,and nonlinear ***,we dramatically enhance the𝑄-factors of Mie resonances in silicon(Si)nanoparticles across the optical band by arranging the nanoparticles in a periodic *** select monocrystalline Si with negligible material losses and develop a unique method to fabricate nanoparticle arrays on a quartz *** extinction dispersion measurements and electromagnetic analysis,we can identify three types of collective Mie resonances with𝑄-factors∼500 in the same nanocylinder arrays,including surface lattice resonances,bound states in the continuum,and quasi-guided *** work paves the way for fundamental research in strong light-matter interactions and the design of highly efficient light-emitting metasurfaces.

关键词： Nanophotonics Dielectric resonators Surface lattice resonances Bound states in the continuum Quasi-guided modes

Arbitrarily structured quantum emission with a multifunctional metalens

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eLight 2023年第1期3卷 75-84页

作者： Chi Li Jaehyuck Jang Trevon Badloe Tieshan Yang Joohoon Kim Jaekyung Kim Minh Nguyen stefan a.maier Junsuk Rho Haoran Ren Igor Aharonovich School of Mathematical and Physical Sciences University of Technology SydneyUltimoNSW 2007Australia School of Physics and Astronomy Monash UniversityMelbourneVIC 3800Australia Department of Chemical Engineering Pohang University of Science and Technology(POSTECH)Pohang 37673Republic of Korea Department of Mechanical Engineering Pohang University of Science and Technology(POSTECH)Pohang 37673Republic of Korea Graduate School of Artificial Intelligence Pohang University of Science and Technology(POSTECH)Pohang 37673Republic of Korea Department of Physics Imperial College LondonLondon SW72AZUK POSCO-POSTECH-RIST Convergence Research Centre for Flat Optics and Metaphotonics Pohang 37673Republic of Korea National Institute of Nanomaterials Technology(NINT) Pohang 37673Republic of Korea ARC Centre of Excellence for Transformative Meta-Optical Systems University of Technology SydneyUltimoNSW 2007Australia

Structuring light emission from single-photon emitters(SPEs)in multiple degrees of freedom is of great importance for quantum information processing towards higher ***,traditional control of emission from quantum light sources relies on the use of multiple bulky optical elements or nanostructured resonators with limited functionalities,constraining the potential of multi-dimensional *** we introduce the use of an ultrathin polarisation-beam-splitting metalens for the arbitrary structuring of quantum emission at room *** to the complete and independent polarisation and phase control at the single meta-atom level,the designed metalens enables simultaneous mapping of quantum emission from ultra-bright defects in hexagonal boron nitride and imprinting of an arbitrary wavefront onto orthogonal polarisation states of the *** hybrid quantum metalens enables simultaneous manipulation of multiple degrees of freedom of a quantum light source,including directionality,polarisation,and orbital angular *** could unleash the full potential of solid-state SPEs for their use as high-dimensional quantum sources for advanced quantum photonic applications.

关键词： temperature quantum arbitrary