Work

Micro-current and voltage detection based on metal-dielectric core-shell WGM microcavity

Year: 2025

Type: article

Abstract: Measurement of low voltage and current is crucial in electronic integrated devices. However, there are certain challenges in directly measuring low voltage and current. Here, we propose a method of detecting micro-current by using laser resonance mode movement in a metal-dielectric core-shell whispering gallery mode (WGM) microcavity. The metal-dielectric core-shell hybrid microcavity is fabricated by using a simple brush-coating method, which has high stability and a low threshold of about 16.8 μJ/cm2. We have achieved electrically tunable WGM lasing by utilizing the thermo-optic effect in the hybrid microcavity. The laser resonant mode of the WGM microcavity can be tuned. The tuning rate is 9.9 nm/V for the lasing peaks. The results provide, to the best of our knowledge, a new strategy for detecting micro-current and voltage.

Source: Optics Express

DOI: 10.1364/oe.580974

Authors: Zishu Zhou, Kun Ge, Jianhao Sun, Songtao Li, Genshan Jiang

Institutions: North China Electric Power University, China Jiliang University

Language: English

Topic: Photonic and Optical Devices

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,270

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