Work

Non-magnetic continuum quasi bound terahertz non-reciprocal device

Year: 2024

Type: article

Abstract: The terahertz isolator breaks the Lorentz reciprocity and is a typical non-reciprocal unidirectional transmission device, which is an indispensable and important component in terahertz systems. Due to the loss of terahertz radiation in current non-reciprocal materials, terahertz non-reciprocal devices remain a significant challenge. By combining third-order nonlinearity with the out of plane asymmetry and in-plane breaking of device structures, a nonlinear silicon grating metasurface terahertz isolator is proposed. By controlling the quasi-bound state radiation linewidth of the continuum medium, the designed silicon grating metasurface structure has an isolation of 12.08 dB and an insertion loss of 4.7 dB under terahertz intensity of 0.5 MW/cm 2 . This device provides a new solution for the design of terahertz non-reciprocal devices and has great application prospects in terahertz integrated systems.

Source: Optics Communications

DOI: 10.1016/j.optcom.2024.131310

Authors: Ya-Li Liu, Jiu-sheng Li

Institution: China Jiliang University

Language: English

Topic: Metamaterials and Metasurfaces Applications

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $2,320

Funders: National Natural Science Foundation of China, Natural Science Foundation of Zhejiang Province