Nanophotonics (Berlin, Germany)最新文献

Longitudinal chiral forces in photonic integrated waveguides to separate particles with realistically small chirality. 光子集成波导中的纵向手性力，用于分离手性很小的粒子。

Nanophotonics (Berlin, Germany) Pub Date : 2024-09-16 eCollection Date: 2024-11-01 DOI: 10.1515/nanoph-2024-0339

Josep Martínez-Romeu, Iago Diez, Sebastian Golat, Francisco J Rodríguez-Fortuño, Alejandro Martínez

{"title":"Longitudinal chiral forces in photonic integrated waveguides to separate particles with realistically small chirality.","authors":"Josep Martínez-Romeu, Iago Diez, Sebastian Golat, Francisco J Rodríguez-Fortuño, Alejandro Martínez","doi":"10.1515/nanoph-2024-0339","DOIUrl":"10.1515/nanoph-2024-0339","url":null,"abstract":"Chiral optical forces exhibit opposite signs for the two enantiomeric versions of a chiral molecule or particle. If large enough, these forces might be able to separate enantiomers all optically, which would find numerous applications in different fields, from pharmacology to chemistry. Longitudinal chiral forces are especially promising for tackling the challenging scenario of separating particles of realistically small chiralities. In this work, we study the longitudinal chiral forces arising in dielectric integrated waveguides when the quasi-TE and quasi-TM modes are combined as well as their application to separate absorbing and non-absorbing chiral particles. We show that chiral gradient forces dominate in the scenario of beating of non-denegerate TE and TM modes when considering non-absorbing particles. For absorbing particles, the superposition of degenerate TE and TM modes can lead to chiral forces that are kept along the whole waveguide length. We accompany the calculations of the forces with particle tracking simulations for specific radii and chirality parameters. We show that longitudinal forces can separate non-absorbing chiral nanoparticles in water even for relatively low values of the particle chirality and absorbing particles with arbitrarily low values of chirality can be effectively separated after enough interaction time.","PeriodicalId":520321,"journal":{"name":"Nanophotonics (Berlin, Germany)","volume":"13 23","pages":"4275-4289"},"PeriodicalIF":0.0,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11636476/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142831657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Orbital magnetism through inverse Faraday effect in metal clusters. 通过金属团簇中的反法拉第效应实现轨道磁性。

Nanophotonics (Berlin, Germany) Pub Date : 2024-09-16 eCollection Date: 2024-11-01 DOI: 10.1515/nanoph-2024-0352

Deru Lian, Yanji Yang, Giovanni Manfredi, Paul-Antoine Hervieux, Rajarshi Sinha-Roy

{"title":"Orbital magnetism through inverse Faraday effect in metal clusters.","authors":"Deru Lian, Yanji Yang, Giovanni Manfredi, Paul-Antoine Hervieux, Rajarshi Sinha-Roy","doi":"10.1515/nanoph-2024-0352","DOIUrl":"10.1515/nanoph-2024-0352","url":null,"abstract":"In view of the recent increased interest in light-induced manipulation of magnetism in nanometric length scales this work presents metal clusters as promising elementary units for generating all-optical ultrafast magnetization. We perform a theoretical study of the opto-magnetic properties of metal clusters through ab-initio real-time (RT) simulations in real-space using time-dependent density functional theory (TDDFT). Through ab-initio calculations of plasmon excitation with circularly polarized laser pulse in atomically precise clusters of simple and noble metals, we discuss the generation of orbital magnetic moments due to the transfer of angular momentum from light field through optical absorption at resonance energies. Notably, in the near-field analysis we observe self-sustained circular motion of the induced electron density corroborating the presence of nanometric current loops which give rise to orbital magnetic moments due to the inverse Faraday effect (IFE) in the clusters. The results provide valuable insights into the quantum many-body effects that influence the IFE-mediated light-induced orbital magnetism in metal clusters depending on its geometry and chemical composition. At the same time, they explicitly demonstrate the possibility for harnessing magnetization in metal clusters, offering potential applications in the field of all-optical manipulation of magnetism.","PeriodicalId":520321,"journal":{"name":"Nanophotonics (Berlin, Germany)","volume":"13 23","pages":"4291-4302"},"PeriodicalIF":0.0,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11636370/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142831659","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Topological valley-locked waveguides with C₄ impurity. 含C4杂质的拓扑锁谷波导。

Nanophotonics (Berlin, Germany) Pub Date : 2024-06-19 eCollection Date: 2024-08-01 DOI: 10.1515/nanoph-2024-0192

Hongxiang Zhang, Rensheng Xie, Xiaofeng Tao, Jianjun Gao

{"title":"Topological valley-locked waveguides with C4 impurity.","authors":"Hongxiang Zhang, Rensheng Xie, Xiaofeng Tao, Jianjun Gao","doi":"10.1515/nanoph-2024-0192","DOIUrl":"10.1515/nanoph-2024-0192","url":null,"abstract":"Heterostructures play a pivotal role in the design of valley-locked waveguides, facilitating the manipulation of width as an additional degree of freedom. Through this design, we demonstrate the extension of the topological guided modes from the domain wall of topologically nontrivial valley photonic crystals (VPCs) into the trivial VPCs. We propose a C4 impurity to control the states of the light wave transmission in topological valley-locked waveguides through the intervalley scattering of defects in Quantum Valley Spin Hall topological insulators. By rotating the C4 structure, the ON/OFF (0°/45°) state of the valley-locked waveguides can be controlled, effectively serving as a switch component. Furthermore, many unique applications could be devised based on the introduced impurity. Examples include the development of coding channels with arbitrary output ports and energy concentrators with enhanced secondary concentration. The proposed topological valley-locked waveguides with C4 impurity will be beneficial for on-chip integrated photonic networks.","PeriodicalId":520321,"journal":{"name":"Nanophotonics (Berlin, Germany)","volume":"13 19","pages":"3727-3736"},"PeriodicalIF":0.0,"publicationDate":"2024-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11465995/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142782348","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ultrashort pulse biphoton source in lithium niobate nanophotonics at 2 μm. 2 μm铌酸锂纳米光子学中的超短脉冲双光子源。

Nanophotonics (Berlin, Germany) Pub Date : 2024-06-13 eCollection Date: 2024-08-01 DOI: 10.1515/nanoph-2024-0054

James Williams, Rajveer Nehra, Elina Sendonaris, Luis Ledezma, Robert M Gray, Ryoto Sekine, Alireza Marandi

引用次数: 0

Inverse design of nonlinear metasurfaces for sum frequency generation. 和频率生成非线性超曲面的反设计。

Nanophotonics (Berlin, Germany) Pub Date : 2024-06-05 eCollection Date: 2024-08-01 DOI: 10.1515/nanoph-2024-0137

Neuton Li, Jihua Zhang, Dragomir N Neshev, Andrey A Sukhorukov

引用次数: 0

Si metasurface supporting multiple quasi-BICs for degenerate four-wave mixing. 支持简并四波混频的多个准bic的Si超表面。

Nanophotonics (Berlin, Germany) Pub Date : 2024-06-05 eCollection Date: 2024-08-01 DOI: 10.1515/nanoph-2024-0128

Gianni Q Moretti, Thomas Weber, Thomas Possmayer, Emiliano Cortés, Leonardo de S Menezes, Andrea V Bragas, Stefan A Maier, Andreas Tittl, Gustavo Grinblat

{"title":"Si metasurface supporting multiple quasi-BICs for degenerate four-wave mixing.","authors":"Gianni Q Moretti, Thomas Weber, Thomas Possmayer, Emiliano Cortés, Leonardo de S Menezes, Andrea V Bragas, Stefan A Maier, Andreas Tittl, Gustavo Grinblat","doi":"10.1515/nanoph-2024-0128","DOIUrl":"10.1515/nanoph-2024-0128","url":null,"abstract":"Dielectric metasurfaces supporting quasi-bound states in the continuum (qBICs) enable high field enhancement with narrow-linewidth resonances in the visible and near-infrared ranges. The resonance emerges when distorting the meta-atom's geometry away from a symmetry-protected BIC condition and, usually, a given design can sustain one or two of these states. In this work, we introduce a silicon-on-silica metasurface that simultaneously supports up to four qBIC resonances in the near-infrared region. This is achieved by combining multiple symmetry-breaking distortions on an elliptical cylinder array. By pumping two of these resonances, the nonlinear process of degenerate four-wave mixing is experimentally realized. By comparing the nonlinear response with that of an unpatterned silicon film, the near-field enhancement inside the nanostructured dielectric is revealed. The presented results demonstrate independent geometric control of multiple qBICs and their interaction through wave mixing processes, opening new research pathways in nanophotonics, with potential applications in information multiplexing, multi-wavelength sensing and nonlinear imaging.","PeriodicalId":520321,"journal":{"name":"Nanophotonics (Berlin, Germany)","volume":"13 18","pages":"3421-3428"},"PeriodicalIF":0.0,"publicationDate":"2024-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11501966/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142782346","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Entangled photon-pair generation in nonlinear thin-films. 非线性薄膜中纠缠光子对的产生。

Nanophotonics (Berlin, Germany) Pub Date : 2024-06-03 eCollection Date: 2024-08-01 DOI: 10.1515/nanoph-2024-0111

Elkin A Santos, Maximilian A Weissflog, Thomas Pertsch, Frank Setzpfandt, Sina Saravi

{"title":"Entangled photon-pair generation in nonlinear thin-films.","authors":"Elkin A Santos, Maximilian A Weissflog, Thomas Pertsch, Frank Setzpfandt, Sina Saravi","doi":"10.1515/nanoph-2024-0111","DOIUrl":"10.1515/nanoph-2024-0111","url":null,"abstract":"We develop a fully vectorial and non-paraxial formalism to describe spontaneous parametric down-conversion in nonlinear thin films. The formalism is capable of treating slabs with a sub-wavelength thickness, describe the associated Fabry-Pérot effects, and even treat absorptive nonlinear materials. With this formalism, we perform an in-depth study of the dynamics of entangled photon-pair generation in nonlinear thin films, to provide a needed theoretical understanding for such systems that have recently attracted much experimental attention as sources of photon pairs. As an important example, we study the far-field radiation properties of photon pairs generated from a high-refractive-index nonlinear thin-film with zinc-blende structure that is deposited on a linear low-refractive-index substrate. In particular, we study the thickness-dependent effect of Fabry-Pérot interferences on the far-field radiation pattern of the photon pairs. We also pay special attention to study of entanglement generation, and find the conditions under which maximally polarization-entangled photon pairs can be generated and detected in such nonlinear thin-films.","PeriodicalId":520321,"journal":{"name":"Nanophotonics (Berlin, Germany)","volume":"13 18","pages":"3545-3561"},"PeriodicalIF":0.0,"publicationDate":"2024-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11501176/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142782344","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Strong Coupling of Organic Molecules 2023 (SCOM23). 有机分子强耦合 2023（SCOM23）。

Nanophotonics (Berlin, Germany) Pub Date : 2024-05-27 eCollection Date: 2024-06-01 DOI: 10.1515/nanoph-2024-0260

Joel Yuen-Zhou, Wei Xiong

引用次数: 0

The future of quantum technologies: superfluorescence from solution-processed, tunable materials. 量子技术的未来：溶液处理、可调材料的超荧光。

Nanophotonics (Berlin, Germany) Pub Date : 2024-02-28 eCollection Date: 2024-05-01 DOI: 10.1515/nanoph-2023-0919

Brendan Russ, Carissa N Eisler

{"title":"The future of quantum technologies: superfluorescence from solution-processed, tunable materials.","authors":"Brendan Russ, Carissa N Eisler","doi":"10.1515/nanoph-2023-0919","DOIUrl":"10.1515/nanoph-2023-0919","url":null,"abstract":"One of the most significant and surprising recent developments in nanocrystal studies was the observation of superfluorescence from a system of self-assembled, colloidal perovskite nanocrystals [G. Rainò, M. A. Becker, M. I. Bodnarchuk, R. F. Mahrt, M. V. Kovalenko, and T. Stöferle, \"Superfluorescence from lead halide perovskite quantum dot superlattices,\" Nature, vol. 563, no. 7733, pp. 671-675, 2018]. Superfluorescence is a quantum-light property in which many dipoles spontaneously synchronize in phase to create a collective, synergistic photon emission with a much faster lifetime. Thus, it is surprising to observe this in more inhomogenous systems as solution-processed and colloidal structures typically suffer from high optical decoherence and non-homogeneous size distributions. Here we outline recent developments in the demonstration of superfluorescence in colloidal and solution-processed systems and explore the chemical and materials science opportunities allowed by such systems. The ability to create bright and tunable superfluorescent sources could enable transformative developments in quantum information applications and advance our understanding of quantum phenomena.","PeriodicalId":520321,"journal":{"name":"Nanophotonics (Berlin, Germany)","volume":"13 11","pages":"1943-1951"},"PeriodicalIF":0.0,"publicationDate":"2024-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11501137/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142782343","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Inverse design in photonic crystals. 光子晶体的逆向设计

Nanophotonics (Berlin, Germany) Pub Date : 2024-02-05 eCollection Date: 2024-04-01 DOI: 10.1515/nanoph-2023-0750

Ruhuan Deng, Wenzhe Liu, Lei Shi

引用次数: 0