Bifunctional Spoof Surface Plasmon Polariton Meta-coupler Using Anisotropic Transmissive Metasurface

Overview

Journal Nanophotonics

Publisher De Gruyter

Date 2024 Dec 5

PMID 39635068

Authors

Dengpan Wang

Kaiyue Liu

Xiaofeng Li

Guangming Wang

Shiwei Tang

Tong Cai

Affiliations

Soon will be listed here.

Abstract

Tailoring the wavefronts of spoof surface plasmon polaritons (SSPPs) at will, especially with multifunctional integration, is of great importance in near-field photonics. However, conventional SSPP devices suffer from the issues of bulk configurations, limited functionalities, and single operating modes, which are unfavorable for electromagnetic (EM) integration. Here, a novel scheme is proposed to design bifunctional SSPP meta-devices based on the polarization dependent property via satisfying the comprehensive phase distributions and multi-mode momentum matching in a transmission geometry. As proof of the concept, we experimentally demonstrate a bifunctional SSPP meta-device in the microwave regime that can convert incident - and -polarized waves to transverse magnetic (TM)-mode SSPP Bessel beams and transverse electric (TE)-mode SSPP focusing beams, respectively. Our findings open a door to achieve near-field manipulation of SSPPs with multi-function and multi-mode integration, which can stimulate the applications of SSPP functional devices, such as near-field sensing, imaging, and on-chip photonics.

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