Design and Characterization of Plasmonic Doppler Grating for Azimuthal Angle-resolved Surface Plasmon Resonances

Performance improvement of refractometric sensors through hybrid plasmonic-Fano resonances

In this paper, we present a plasmonic refractometric sensor that works under normal incidence; allowing its integration on a fiber tip. The sensor's material and geometry exploit the large scattering cross-section given by high-contrast of the index of refraction subwavelength dielectric gratings. Our design generates a hybrid plasmonic-Fano resonance due to the interference between the surface plasmon resonance and the grating response. We optimize the sensor with a merit function that combines the quality parameter of the resonance and the field enhancement at the interaction volume where th…

Add drop multiplexers for terahertz communications using two-wire waveguide based plasmonic circuits

Terahertz (THz) band is considered as the next frontier in wireless communications. The emerging THz multiplexing techniques are expected to dramatically increase the information capacity of THz communications far beyond a single channel limit. In this work, we explore the THz frequency-division multiplexing modality enabled by novel add-drop multiplexer (ADM) design. Based on modular two-wire plasmonic waveguides fabricated using additive manufacturing and metallization techniques, we demonstrate four-port THz ADMs containing grating-loaded side couplers for operation at ~140 GHz carrier freq…

太赫兹等离子体晶体相位的电调控

Electrical Tuning of Terahertz Plasmonic Crystal Phases

本研究结合理论与实验探究纳米尺度AlGaN/GaN光栅栅极结构，识别出太赫兹等离子体晶体的离域与局域两种相位，观测到其电调控连续转变，发现边缘栅极效应，为太赫兹光电器件研发奠定基础。

利用临界耦合双模等离子体共振的高速超表面调制器

High-speed metasurface modulator using critically coupled bimodal plasmonic resonance

本文提出一种基于临界耦合双模等离子体共振的高速等离子体超表面电光调制器，在近红外波段实现了9.5 dB调制深度和1.25 GHz带宽，为超高速有源超表面器件提供了新机遇。

具有光栅化CdS和嵌入式等离激元Au纳米颗粒的钙钛矿太阳能电池的光学、热学和电学分析

Optical, Thermal, and Electrical Analysis of Perovskite Solar Cell with Grated CdS and Embedded Plasmonic Au Nanoparticles

本文提出在钙钛矿太阳能电池中引入光栅化CdS电子传输层和等离激元Au NPs，通过增强光吸收和降低复合显著提升短路电流密度与转换效率，并分析了其热学影响。

Plasmonic sensors based on funneling light through nanophotonic structures

We present a refractometric sensor realized as a stack of metallic gratings with subwavelength features and embedded within a low-index dielectric medium. Light is strongly confined through funneling mechanisms and excites resonances that sense the analyte medium. Two terminations of the structure are compared. One of them has a dielectric medium in contact with the analyte and exploits the selective spectral transmission of the structure. The other design has a metallic continuous layer that generates surface plasmon resonances at the metal/analyte interface. Both designs respond with narrow …

通过离散动量空间探针进行表面等离激元模态色散的材料特异性映射

Material-Specific Mapping of Plasmonic Modal Dispersion via Discrete Momentum-Space Probes

研究挑战是精确测量表面等离激元极化激元色散，核心方法是利用亚波长孔径等离子体光栅透射光谱重建色散，通过非厄米本征模分解等实现，贡献是与多模型计算及实验数据集一致，与材料无关且评估了对壁粗糙度的敏感性。

石墨烯-Weyl半金属等离激元结构中双波段非互易辐射的动态调控

Dynamic modulation of dual-band nonreciprocal radiation in a graphene-Weyl semimetal plasmonic structure

该研究提出石墨烯-Weyl半金属混合等离激元结构，通过光栅几何参数和石墨烯费米能级实现双波段非互易辐射的稳健调控与动态波长调谐。

Giant THz surface plasmon polariton induced by high-index dielectric metasurface

We use computational approaches to explore the role of a high-refractive-index dielectric TiO2 grating with deep subwavelength thickness on InSb as a tunable coupler for THz surface plasmons. We find a series of resonances as the grating couples a normally-incident THz wave to standing surface plasmon waves on both thin and thick InSb layers. In a marked contrast with previously-explored metallic gratings, we observe the emergence of a much stronger additional resonance. The mechanism of this giant plasmonic resonance is well interpreted by the dispersion of surface plasmon excited in the air\…

电流对AlGaN/GaN异质结中太赫兹等离子体激元的影响

Effect of current on terahertz plasmons in AlGaN/GaN heterostructures

该研究考察AlGaN/GaN异质结二维电子气等离子体激元晶体的太赫兹透射谱随横向偏压的变化，发现两种结构均出现电流诱导的共振红移，明确电子浓度分布变化与焦耳热为主要成因，为偏置下太赫兹等离子体器件设计提供依据。

模板化分子层与表面晶格共振之间的光-物质相互作用

Light-matter interaction between templated molecular layers and surface lattice resonances

本文利用取向石墨烯纳米带模板化部花青分子层，研究其与等离激元光栅表面晶格共振的偏振依赖耦合，发现高有序层的耦合强度反而低于非晶层。

三维等离子体纳米马达通过光学拉力与横向力的独立集成实现

3-dimensional plasmonic nanomotors enabled by independent integration of Optical Pulling and Lateral Forces

本文提出一种三维等离子体纳米马达设计，通过独立控制横向和纵向运动，利用贝塞尔光束和介电圆柱实现光学拉力与横向力，实现纳米尺度的精确运动控制。