Excitation of surface plasmon polaritons by diffraction-free and vector beams
Excitation of surface plasmon polaritons by diffraction-free and vector beams
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DOI：
10.1364/ao.465853
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发表时间：
2022-09-01
期刊：
影响因子：
1.9
通讯作者：
Toussaint, Kimani C., Jr.
中科院分区：
文献类型：
--
作者：
Diouf, Mbaye;Burrow, Joshua A.;Toussaint, Kimani C., Jr.
表面等离子体激元（SPPs）通常由聚焦的横磁（TM）高斯光束的瑞利范围内的平面波激发。在这里，我们调查和确认SPP和二维高斯和贝塞尔-高斯波包，以及一维光片和时空波包之间的耦合。我们编码的入射波阵面与空间变化的偏振态，然后我们耦合的径向和方位角矢量光束轮廓的相应TM组件，以确认偏振相关性和空间模式的选择性。我们的研究结果不需要通过周期性波纹金属表面进行材料优化或多维限制，从而在更大程度上实现耦合，从而概述了一个关键的，但通常被忽视的，远程生物传感器和全光集成等离子体电路的发展路径。(c)2022光学出版集团
Surface plasmon polaritons (SPPs) are traditionally excited by plane waves within the Rayleigh range of a focused transverse-magnetic (TM) Gaussian beam. Here we investigate and confirm the coupling between SPPs and two-dimensional Gaussian and Bessel-Gauss wave packets, as well as one-dimensional light sheets and space-time wave packets. We encode the incoming wavefronts with spatially varying states of polarization; then we couple the respective TM components of radial and azimuthal vector beam profiles to confirm polarization-correlation and spatial-mode selectivity. Our results do not require material optimization or multi-dimensional confinement via periodically corrugated metal surfaces to achieve coupling at a greater extent, hereby outlining a pivotal, yet commonly overlooked, path towards the development of long-range biosensors and all-optical integrated plasmonic circuits. (c) 2022 Optica Publishing Group