Multilevel dynamic control of surface plasmon propagation direction using phase-change materials

Nanoscale 2026

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Authors: Xianghua Liu, Ruxue Wang, Renhong Lu, Jiahao Peng, Changli Liu, Qianhong Gong, Peichuan Yin, Xinrui Lei, Qiwen Zhan, Aimin Wu
DOI: 10.1039/d5nr04634c
Cited by: 0
References: 45

Abstract

in its amorphous and crystalline phases, we demonstrate active multilevel control of SPP launching with a high extinction ratio (ER) contrast, enabling both one-way and two-way nanosecond switching. The one-way switching achieves high ER values of -15.4 dB (on) and -0.42 dB (off), while the two-way switching exhibits an ER of -10.8 dB (rightward) in the amorphous state and an ER of 5.0 dB (leftward) in the crystalline state. The extinction ratio contrast reaches 15 dB, resulting in a modulation efficiency of up to 96.8%. This approach for surface plasmon manipulation paves the way for ultra-compact plasmonic devices, such as modulators and optical switches, advancing the miniaturization of photonic components.

Fields of Study & Subjects

Plasmonic and Surface Plasmon Research Phase-change materials and chalcogenides Metamaterials and Metasurfaces Applications

Publication details

Journal / source
Nanoscale
Volume
18
Issue
12
Pages
6342–6349
Publication date
1 January 2026
Language
EN