Work

Topological edge modes enable plasmon-induced transparency in isotropic and anisotropic 2D materials

Year: 2025

Type: article

Abstract: In this paper, we propose a plasmonically induced transparency (PIT) effect in 2D materials mediated by topological edge modes (TEMs). The topological PIT system consists of several units of the Su-Schrieffer-Heeger (SSH)-modeled multilayer nanoribbons coupled with a bus waveguide. Using isotropic graphene and anisotropic black phosphorus (BP) as prototypes, we demonstrate that establishing a topologically nontrivial phase enables the coexistence of bright and dark TEMs. These two modes generate a PIT spectral signature, accurately modeled by coupled mode theory. Compared to conventional PIT, our topology-driven design combines robustness with superior performance (e.g., higher Q-factors and figure of merit), while preserving topological protection against a certain degree of defect and disorders. This work presents a universal platform for designing PIT in plasmonic 2D materials, enabling topologically protected and high-performance PIT devices such as on-chip sensors.

Source: Optics Express

DOI: 10.1364/oe.565468

Authors: Di Zhang, Xiang Zhai, Shengxuan Xia

Institutions: Hunan University, Southeast University

Language: English

Topic: Plasmonic and Surface Plasmon Research

Subfield: Biomedical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,270