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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

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

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纳米光子学中的光学涡旋

中国光学 2021年第4期14卷 792-811页

作者：李晨昊 Maier Stefan A 任浩然 chair in hybrid nanosystems Nanoinstitute MunichFaculty of PhysicsLudwigMaximilians-Universität MünchenMünchen80539Germany Department of Physics Imperial College LondonLondon SW72AZUnited Kingdom MQ Photonics Research Centre Department of Physics and AstronomyMacquarie UniversityAustralia

在过去的二十年中,携带轨道角动量的涡旋光引起了研究人员的广泛兴趣。涡旋光不仅在光与物质相互作用中扮演着重要角色,而且可极大拓宽光学信息的承载容量。与此同时,纳米科技的发展使得纳米光子学成为一个新兴学科,开辟了利用纳米结构... 详细信息

在过去的二十年中,携带轨道角动量的涡旋光引起了研究人员的广泛兴趣。涡旋光不仅在光与物质相互作用中扮演着重要角色,而且可极大拓宽光学信息的承载容量。与此同时,纳米科技的发展使得纳米光子学成为一个新兴学科,开辟了利用纳米结构和器件对光进行调控的新途径。当纳米技术和涡旋光相结合时,衍生出许多新的思路和概念。本文回顾和总结了基于纳米光子学的涡旋光产生、探测及其应用,并对该研究领域的未来进行了展望。

关键词：轨道角动量光与物质相互作用光学涡旋涡旋光纳米光子学光学信息纳米技术纳米科技

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

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

Optically Digitalized Holography: A Perspective for All-Optical Machine Learning

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Engineering 2019年第3期5卷 363-365页

作者： Min Gu Xinyuan Fang Haoran Ren Elena Goi Laboratory of Artificial-Intelligence Nanophotonics School of Science RMIT University Melbourne VIC 3001 Australia National Laboratory of Solid State Microstructures College of Engineering and Applied Sciences Nanjing University Nanjing 210093 China chair in hybrid nanosystems Nanoinstitute Munich Faculty of Physics Ludwig-Maximilians-University Munich Munich 80539 Germany

Holography, which was invented by Dennis Gabor in 1948, offers an approach to reconstructing both the amplitude and phase information of a three-dimensional (3D) object [1]. Since its invention, the concept of holography has been widely used in various fields, such as microscopy [2], interferometry [3], ultrasonography [4], and holographic display [5]. Optical holography can be divided into two steps: recording and reconstruction. A conventional hologram is recorded onto a photosensitive film as the interference between an object beam carrying the 3D object information and a reference beam. Thereafter, the original object wavefront is reconstructed in the 3D image space by illuminating the reference beam on the recorded hologram.

关键词： All-Optical Machine Optically Digitalized Holography

Tuning the intermediate reaction barriers by a CuPd catalyst to improve the selectivity of CO_(2) electroreduction to C_(2) products

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Chinese Journal of Catalysis 2021年第9期42卷 1500-1508页

作者： Li Zhu Yiyang Lin ang Liu Emiliano Cortés Hongmei Li Junhua Hu Akira Yamaguchi Xiaoliang Liu Masahiro Miyauchi Junwei Fu Min Liu Shenzhen Research Institute School of Physics and ElectronicsCentral South UniversityChangsha 410083HunanChina chair in hybrid nanosystems Nanoinstitute MunichFaculty of PhysicsLudwig‐Maximilians‐Universität München80539 MünchenGermany School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450052HenanChina Department of Materials Science and Engineering School of Materials and Chemical TechnologyTokyo Institute of TechnologyTokyo 152‐8552Japan

Electrochemical CO2 reduction is a promising strategy for the utilization of CO2 and intermittent excess *** is the only single metal catalyst that can electrochemically convert CO2 into multicarbon ***,Cu exhibits an unfavorable activity and selectivity for the generation of C2 products because of the insufficient amount of CO*provided for the C‐C *** on the strong CO2 adsorption and ultrafast reaction kinetics of CO*formation on Pd,an intimate CuPd(100)interface was designed to lower the intermediate reaction barriers and improve the efficiency of C2 product *** functional theory(DFT)calculations showed that the CuPd(100)interface enhanced the CO2 adsorption and decreased the CO2*hydrogenation energy barrier,which was beneficial for the C‐C *** potential‐determining step(PDS)barrier of CO2 to C2 products on the CuPd(100)interface was 0.61 eV,which was lower than that on Cu(100)(0.72 eV).Encouraged by the DFT calculation results,the CuPd(100)interface catalyst was prepared by a facile chemical solution method and characterized by transmission electron ***2 temperature‐programmed desorption and gas sensor experiments further confirmed the enhancement of the CO2 adsorption and CO2*hydrogenation ability of the CuPd(100)interface ***,the obtained CuPd(100)interface catalyst exhibited a C2 Faradaic efficiency of 50.3%±1.2%at‒1.4 VRHE in 0.1 M KHCO3,which was 2.1 times higher than that of the Cu catalyst(23.6%±1.5%).This study provides the basis for the rational design of Cu‐based electrocatalysts for the generation of multicarbon products by fine‐tuning the intermediate reaction barriers.

关键词： Carbon dioxide reduction C2 products Electrocatalyst Copper‐palladium interface Intermediate reaction barriers