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Control of light-matter interactions in two-dimensional materials with nanoparticle-on-mirror structures

Opto-Electronic Science 2024年第7期3卷 1-19页

作者： Shasha Li Yini Fang Jianfang Wang School of Integrated Circuits Sun Yat-sen UniversityShenzhen 518107China Department of Physics The Chinese University of Hong KongShatinHong Kong SAR 999077China

light–matter interactions in two-dimensional(2D)materials have been the focus of research since the discovery of *** light–matter interaction length in 2D materials is,however,much shorter than that in bulk materials owing to the atomic nature of 2D *** nanostructures are usually integrated with 2D materials to enhance the light–matter interactions,offering great opportunities for both fundamental research and technological ***-on-mirror(NPo M)structures with extremely confined optical fields are highly desired in this *** addition,2D materials provide a good platform for the study of plasmonic fields with subnanometer resolution and quantum plasmonics down to the characteristic length scale of a single atom.A focused and up-to-date review article is highly desired for a timely summary of the progress in this rapidly growing field and to encourage more research efforts in this *** this review,we will first introduce the basic concepts of plasmonic modes in NPo M *** between plasmons and quasi-particles in 2D materials,e.g.,excitons and phonons,from weak to strong coupling and potential applications will then be described in *** phenomena in subnanometer metallic gaps separated by 2D materials,such as quantum tunneling,will also be *** will finally discuss phenomena and physical processes that have not been understood clearly and provide an outlook for future *** believe that the hybrid systems of2D materials and NPo M structures will be a promising research field in the future.

关键词： light-matter interactions nanoparticle-on-mirror structures plasmonic enhancement two-dimensional materials

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Atom-field dynamics in curved spacetime

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Frontiers of physics 2024年第5期19卷 1-34页

作者： Syed Masood A.S.Bukhari Li-Gang Wang School of Physics Zhejiang UniversityHangzhou 310027China

Some aspects of atom-field interactions in curved spacetime are *** great interest are quantum radiative and entanglement processes arising out of Rindler and black hole spacetimes,which involve the role of Hawking-Unruh and dynamical Casimir *** of the discussion surrounds the radiative part of *** this,we specifically reassess the conventional understandings of atomic radiative transitions and energy level shifts in curved *** also briefly outline the status quo of entanglement dynamics study in curved spacetime,and highlight literature related to some novel insights,like entanglement *** one hand,the study of the role played by spacetime curvature in quantum radiative and informational phenomena has implications for fundamental physics,notably the gravity-quantum *** particular,one examines the viability of the Equivalence Principle,which is at the heart of Einstein’s general theory of *** the other hand,it can be instructive for manipulating quantum information and light propagation in arbitrary *** issues related to nonthermal effects of acceleration are also discussed.

关键词： atom-field interactions general relativity Minkowski and curved spacetime quantum field theory in curved spacetime light-matter interactions spontaneous excitations

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Inorganic Nanostructures with Strong Chiroptical Activity

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CCS Chemistry 2020年第3期2卷 583-604页

作者： Anastasia Visheratina Nicholas A.Kotov University of Michigan Biointerfaces InstituteAnn ArborMichigan

Chirality is one of the most remarkable geometrical properties with a variety of manifestations in the material *** discovery of chirality in inorganic nanostructures spurred the rapid growth of fundamental and applied studies involving chiral nanoscale particles in chemistry,biology,medicine,and *** many factors make chiral inorganic nanostructures significant to researchers from many backgrounds,the unique characteristic that drives research in this area is their ability to exhibit high chiroptical *** this review,we specifically address its origin in juxtaposition with chiral organic *** activity depends on multiple factors,including the degree of asymmetry and the size of the object,compared with light ***,it is the high polarizability that distinguishes chiral inorganic matter from what is known from organic chemistry and *** importantly,strong light-matter interaction between chiral nanostructures and circularly polarized photons has direct implications for the long-standing fundamental questions about the origin of homochirality on earth and new possibilities for chiral *** insight into chiroptical activity also deepens the existing knowledge about the nanoscale matter and expands its technological applications.

关键词： chirality optical activity circular dichroism light-matter interactions nanoparticles

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Spin-orbit-locked hyperbolic polariton vortices carrying reconfigurable topological charges

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elight 2022年第1期2卷 143-153页

作者： Mingsong Wang Guangwei Hu Saroj Chand Michele Cotrufo Yohannes Abate Kenji Watanabe Takashi Taniguchi Gabriele Grosso Cheng‑Wei Qiu Andrea Alù Photonics Initiative Advanced Science Research CenterCity University of New YorkNew York CityNY 10031USA Department of Electrical and Computer Engineering National University of SingaporeSingapore 116083Singapore Department of Physics and Astronomy The University of GeorgiaAthensGA 30602USA Research Center for Functional Materials National Institute for Materials ScienceTsukubaIbaraki 305‑0044Japan International Center for Materials Nanoarchitectonics National Institute for Materials ScienceTsukubaIbaraki 305‑0044Japan Physics Program Graduate CenterCity University of New YorkNew YorkNY 10016USA

The topological features of optical vortices have been opening opportunities for free-space and on-chip photonic technologies,e.g.,for multiplexed optical communications and robust information *** a parallel but disjoint effort,polar anisotropic van der Waals nanomaterials supporting hyperbolic phonon polaritons(HP2s)have been leveraged to drastically boost light-matter *** far HP2 studies have been mainly focusing on the control of their amplitude and scale *** we report the generation and observation of mid-infrared hyperbolic polariton vortices(HP2Vs)associated with reconfigurable topological ***-shaped gold disks coated with a flake of hexagonal boron nitride are exploited to tailor spin-orbit interactions and realise deeply subwavelength *** complex interplay between excitation spin,spiral geometry and HP2 dispersion enables robust reconfigurability of the associated topological *** results reveal unique opportunities to extend the application of HP2s into topological photonics,quantum information processing by integrating these phenomena with single-photon emitters,robust on-chip optical applications,sensing and nanoparticle manipulation.

关键词： Hyperbolic polariton vortex light-matter interactions Spin-orbit interaction Topological charge Reconfigurability

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Comparison of optical properties of bioaerosols composed of microbial spores and hyphae[Invited]

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Chinese Optics Letters 2023年第9期21卷 40-46页

作者：王新宇胡以华杨星顾有林何海浩丁婉莹王鹏 Electronic Countermeasure Institute National University of Defense TechnologyHefei 230037China State Key Laboratory of Pulsed Power Laser Technology National University of Defense TechnologyHefei 230037China Advanced Laser Technology Laboratory of Anhui Province Hefei 230037China Key Laboratory of High Magnetic Field and Ion Beam Physical Biology Hefei Institute of Physical ScienceChinese Academy of SciencesHefei 230037China

Bioaerosols exhibit significant broadband extinction performance and have vital impacts on climate change,optical detection,communication,disease transmission,and the development of optical attenuation *** spores and microbial hyphae represent two primary forms of bioaerosol ***,a comprehensive investigation and comparison of their optical properties have not been conducted *** this paper,the spectra of spores and hyphae were tested,and the absorption peaks,component contents,and protein structural differences were *** structural models were established,and the optical attenuation parameters were *** chamber experiments were conducted to verify the optical attenuation performance of microbial spores and hyphae in the mid-infrared and far-infrared spectral *** demonstrate that selecting spores and hyphae can significantly reduce the average transmittance from 21.2%to 6.4%in the mid-infrared band and from 31.3%to 19.6%in the far-infrared band within three *** conclusions have significant implications for the selection of high-performance microbial optical attenuation materials as well as for the rapid detection of bioaerosol types in research on climate change and the spread of pathogenic aerosols.

关键词： bioaerosol optical properties optical materials light-matter interactions Fourier transform infrared spectra.

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