检索结果-南通市图书馆

Gradient-induced long-range optical pulling force based on photonic band gap

Light(Science & Applications) 2024年第5期13卷 865-874页

作者： Wenlong Lu Alexey v.Krasavin Sheng Lan anatoly v.zayats Qiaofeng Dai Guangdong Basic Research Center of Excellence for Structure and Fundamental Interactions of Matter Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and DevicesSchool of Information and Optoelectronic Science and EngineeringSouth China Normal UniversityGuangzhou 510006China Department of Physics and London Centre for Nanotechnology King’s College LondonLondon WC2R 2LSUK

Optical pulling provides a new degree of freedom in optical *** is generally believed that long-range optical pulling forces cannot be generated by the gradient of the incident ***,we theoretically propose and numerically demonstrate the realization of a long-range optical pulling force stemming from a self-induced gradient field in the manipulated *** analogy to potential barriers in quantum tunnelling,we use a photonic band gap design in order to obtain the intensity gradients inside a manipulated object placed in a photonic crystal waveguide,thereby achieving a pulling *** the usual scattering-type optical pulling forces,the proposed gradient-field approach does not require precise elimination of the reflection from the manipulated *** particular,the Einstein-Laub formalism is applied to design this unconventional gradient *** magnitude of the force can be enhanced by a factor of up to 50 at the optical resonance of the manipulated object in the waveguide,making it insensitive to *** developed approach helps to break the limitation of scattering forces to obtain longrange optical pulling for manipulation and sorting of nanoparticles and other *** developed principle of using the band gap to obtain a pulling force may also be applied to other types of waves,such as acoustic or water waves,which are important for numerous applications.

关键词： optical waveguide scattering

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

All-optical switching in silicon photonic waveguides with an epsilon-near-zero resonant cavity [Invited]

引用

Photonics Research 2018年第5期6卷 I0026-I0030页

作者： ANDRES D.NEIRA GREGORY A.WURTZ anatoly v.zayats Department of Physics King's College London

Strong nonlinearity of plasmonic metamaterials can be designed near their effective plasma frequency in the epsilon-near-zero(ENZ) regime. We explore the realization of an all-optical modulator based on the Au nonlinearity using an ENZ cavity formed by a few Au nanorods inside a Si photonic waveguide. The resulting modulator has robust performance with a modulation depth of about 30 dB/μm and loss less than 0.8 dB for switching energies below 600 fJ. The modulator provides a double advantage of high mode transmission and strong nonlinearity enhancement in the few-nanorod-based design.

关键词： All-optical switching silicon photonic waveguides an epsilon-near-zero resonant cavity

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Generalization of the optical theorem: experimental proof for radially polarized beams

引用

Light(Science & Applications) 2018年第1期7卷 708-717页

作者： Alexey v.Krasavin Paulina Segovia Rostyslav Dubrovka Nicolas Olivier Gregory A.Wurtz Pavel Ginzburg anatoly v.zayats Department of Physics King’s College LondonStrandLondon WC2R 2LSUK Department of Electronic Engineering Queen Mary University of LondonLondonUK School of Electrical Engineering Tel Aviv UniversityRamat AvivTel Aviv 69978Israel ITMO University St.Petersburg 197101Russia Departamento de Optica CICESECarretera Ensenada-Tijuana 391822860 EnsenadaMexico Laboratory for Optics&Biosciences Ecole PolytechniqueCNRS UMR 7645F-91128 PalaiseauFrance Department of Physics University of North FloridaJacksonville FL 32224USA

The optical theorem,which is a consequence of the energy conservation in scattering processes,directly relates the forward scattering amplitude to the extinction cross-section of the *** derived for planar scalar waves,it neglects the complex structure of the focused beams and the vectorial nature of the electromagnetic *** the other hand,radially or azimuthally polarized fields and various vortex beams,essential in modern photonic technologies,possess a prominent vectorial field ***,we experimentally demonstrate a complete violation of the commonly used form of the optical theorem for radially polarized beams at both visible and microwave *** show that a plasmonic particle illuminated by such a beam exhibits strong extinction,while the scattering in the forward direction is *** generalized formulation of the optical theorem provides agreement with the observed *** reported effect is vital for the understanding and design of the interaction of complex vector beams carrying longitudinal field components with subwavelength objects important in imaging,communications,nanoparticle manipulation,and detection,as well as metrology.

关键词： structure. field. theorem

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Experimental demonstration of linear and spinning Janus dipoles for polarisation-and wavelength-selective near-field coupling

引用

Light(Science & Applications) 2019年第1期8卷 732-738页

作者： Michela F.Picardi Martin Neugebauer Jorg S.Eismann Gerd Leuchs Peter Banzer Francisco J.Rodriguez-Fortuno anatoly v.zayats Department of Physics and London Centre for Nanotechnology King’s College LondonStrandLondon WC2R LS UK.2Max Planck Institute for the Science of LightStaudtstr.2D-91058 ErlangenGermany Institute of Optics Information and PhotonicsUniversity Erlangen-NurembergStaudtstr.7/B2D-91058 ErlangenGermany

The electromagnetic field scattered by nano-objects contains a broad range of wavevectors and can be efficiently coupled to waveguided *** dominant contribution to scattering from subwavelength dielectric and plasmonic nanoparticles is determined by electric and magnetic dipolar ***,we experimentally demonstrate spectral and phase selective excitation of Janus dipoles,sources with electric and magnetic dipoles oscillating out of phase,in order to control near-field interference and directional coupling to *** show that by controlling the polarisation state of the dipolar excitations and the excitation wavelength to adjust their relative contributions,directionality and coupling strength can be fully ***,we introduce a novel spinning Janus dipole featuring cylindrical symmetry in the near and far field,which results in either omnidirectional coupling or *** the propagation of guided light waves via fast and robust near-field interference between polarisation components of a source is required in many applications in nanophotonics and quantum optics.

关键词： coupling spinning excitation

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Topological transformation and free-space transport of photonic hopfions

引用

Advanced Photonics 2023年第1期5卷 1-7页

作者： Yijie Shen Bingshi Yu Haijun Wu Chunyu Li Zhihan Zhu anatoly v.zayats University of Southampton Optoelectronics Research Centre and Centre for Photonic MetamaterialsSouthamptonUnited Kingdom Harbin University of Science and Technology Wang Da-Heng CenterHeilongjiang Key Laboratory of Quantum ControlHarbinChina King’s College London London Centre for NanotechnologyDepartment of PhysicsLondonUnited Kingdom

Structured light fields embody strong spatial variations of polarization,phase,and ***,characterization,and exploitation of such fields can be achieved through their topological ***-dimensional(3D)topological solitons,such as hopfions,are 3D localized continuous field configurations with nontrivial particle-like structures that exhibit a host of important topologically protected ***,we propose and demonstrate photonic counterparts of hopfions with exact characteristics of Hopf fibration,Hopf index,and Hopf mapping from real-space vector beams to homotopic hyperspheres representing polarization *** experimentally generate photonic hopfions with on-demand high-order Hopf indices and independently controlled topological textures,including Néel-,Bloch-,and antiskyrmionic *** also demonstrate a robust free-space transport of photonic hopfions,thus showing the potential of hopfions for developing optical topological informatics and communications.

关键词： topology skyrmions hopfions structured light spin-orbital interaction

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Nondiffractive three-dimensional polarization features of optical vortex beams

引用

Advanced Photonics Nexus 2023年第2期2卷 39-47页

作者： Andrei Afanasev Jack J.Kingsley-Smith Francisco J.Rodríguez-Fortuño anatoly v.zayats The George Washington University Department of PhysicsWashingtonDCUnited States King’s College London Department of Physics and London Centre for NanotechnologyLondonUnited Kingdom

vector optical vortices exhibit complex polarization patterns due to the interplay between spin and orbital angular *** we demonstrate,both analytically and with simulations,that certain polarization features of optical vortex beams maintain constant transverse spatial dimensions independently of beam divergence due to *** polarization features appear in the vicinity of the phase singularity and are associated with the presence of longitudinal electric *** predicted effect may prove important in metrology and high-resolution imaging applications.

关键词： optical angular momentum diffraction polarization

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Repulsion of polarised particles from anisotropic materials with a near-zero permittivity component

引用

Light(Science & Applications) 2016年第1期5卷 752-759页

作者： Francisco J Rodríguez-Fortuño anatoly v.zayats Department of Physics King’s College LondonStrandLondon WC2R 2LSUK

Reduction of adhesion and stiction is crucial for robust operation on nanomechanical and optofluidic devices as well as atom and molecule behaviour near *** can be achieved using electric charging,magnetic materials or light pressure and optical *** we show that a particle scattering or emitting in close proximity to an anisotropic substrate can experience a repulsive force if one of the diagonal components of the permittivity tensor is close to *** derive an analytic condition for the existence of such repulsive force depending on the optical properties of the *** also demonstrate the effect using realistic anisotropic metamaterial implementations of a *** anisotropic metamaterial approach using metal–dielectric and graphene–dielectric multilayers provides a tuneable spectral range and a very broad bandwidth of electromagnetic repulsion forces,in contrast to isotropic substrates.

关键词： anisotropy metamaterials optical force repulsion

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Universal switching of plasmonic signals using optical resonator modes

引用

Light(Science & Applications) 2016年第1期5卷 135-142页

作者： Cillian PT McPolin Nicolas Olivier Jean-Sebastien Bouillard Daniel O’Connor Alexey v Krasavin Wayne Dickson Gregory A Wurtz anatoly v.zayats Department of Physics King’s College LondonStrandLondon WC2R 2LSUK Present address:University of Sheffield Hounsfield RoadSheffield S37RHUK Present address:University of Hull Cottingham RoadHull HU67RXUK Present address:National Physical Laboratory Hampton RoadTeddingtonMiddlesex TW110LWUK University of North Florida 1 UNF DriveJacksonvilleFL 32224USA

We propose and investigate,both experimentally and theoretically,a novel mechanism for switching and modulating plasmonic signals based on a Fano interference process,which arises from the coupling between a narrow-band optical Fabry–Pérot cavity and a surface plasmon polariton(SPP)*** SPP wave emitted from the cavity is actively modulated in the vicinity of the cavity resonances by altering the cavity Q-factor and/or resonant *** experimentally demonstrate dynamic SPP modulation both by mechanical control of the cavity length and all-optically by harnessing the ultrafast nonlinearity of the Au mirrors that form the *** electro-optical modulation scheme is also proposed and numerically *** operation of the switch via mechanical means yields a modulation in the SPP coupling efficiency of~80%,while the all-optical control provides an ultrafast modulation with an efficiency of 30%at a rate of~0.6 *** experimental observations are supported by both analytical and numerical calculations of the mechanical,all-optical and electro-optical modulation methods.

关键词： Fano resonances optical signal processing plasmonics ultrafast switching

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advanced Photonics:Thank you for five wonderful years

引用

Advanced Photonics 2024年第1期6卷 5-5页

作者： anatoly v. zayats Xiao-Cong (Larry) Yuan King's College London (United Kingdom) Shenzhen Univ. (China)

As we mark the fifth anniversary of Advanced Photonics,we are filled with immense pride and gratitude for the remarkable journey we have undertaken together with our authors,readers,reviewers,Editorial Board,and *** the past half-decade,the journal has fostered groundbreaking research and facilitated discussions on the most innovative topics of optics and *** is reflected in our current standing as one of the top five journals in optics.

关键词： journal optics discussions

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Spontaneous emission in non-local materials

引用

Light(Science & Applications) 2016年第1期5卷 1-10页

作者： Pavel Ginzburg Diane J Roth Mazhar E Nasir Paulina Segovia Alexey v Krasavin James Levitt Liisa M Hirvonen Brian Wells Klaus Suhling David Richards viktor A Podolskiy anatoly v.zayats Department of Physics King’s College LondonStrandLondon WC2R 2LSUK Present address:School of Electrical Engineering Tel Aviv UniversityTel Aviv 69978Israel Department of Physics and Applied Physics University of Massachusetts LowellOne University AveLowellMA 01854USA Present address:Department of Physics University of HartfordWest HartfordCT 06117USA

Light–matter interactions can be strongly modified by the surrounding ***,we report on the first experimental observation of molecular spontaneous emission inside a highly non-local metamaterial based on a plasmonic nanorod *** show that the emission process is dominated not only by the topology of its local effective medium dispersion,but also by the non-local response of the composite,so that metamaterials with different geometric parameters but the same local effective medium properties exhibit different Purcell factors.A record-high enhancement of a decay rate is observed,in agreement with the developed quantitative description of the Purcell effect in a non-local *** engineered material non-locality introduces an additional degree of freedom into quantum electrodynamics,enabling new applications in quantum information processing,photochemistry,imaging and sensing with macroscopic composites.

关键词： composite electromagnetic materials non-local optical properties plasmonic metamaterials quantum electrodynamics spontaneous emission

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：