A Compact Graphene-Based Hot Electron Bolometer System for Terahertz Radiation Detection
摘要
In this paper, we present the development of a compact hot electron bolometer (HEB) system for terahertz radiation detection. The bolometer system integrates a graphene-based HEB as its core detection unit and employs a compact infrared Dewar for efficient cooling of the graphene-based HEB. Utilizing 300 K/77 K loads as calibration sources, we quantified the sensitivity of the bolometer system at 4.2K. The measured results demonstrate a moderate sensitivity, with a noise equivalent power (NEP) of approximately 3.3 × 10–12 W/Hz0.5. Furthermore, we evaluated the bolometer system’s response time by applying a modulated terahertz signal, and the measured response time is found to be approximately 1 µs. These results underscore the promising potential of our graphene-based HEB bolometer system, especially in applications that require sensitive and high-speed detection capabilities.