Applied Physics Letters· 2025Q1
A niobium nitride superconducting hot electron bolometer direct terahertz detector working at 9 K
- 2citations
- Q1SCImago
- 2025year
Short summary
A suspended NbN/Nb5N6 hot electron bolometer (HEB) detector achieves undegraded sensitivity at a 9 K bath temperature, double that of previous NbN HEBs.
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Key points
- A new suspended NbN/Nb5N6 HEB detector was developed.
- The detector maintains high sensitivity at a 9 K bath temperature, double that of standard NbN HEBs.
- The optical noise equivalent power was measured to be of the order of pW/Hz1/2 at 9 K.
- Simulations show that adjusting thermal relaxation can improve detector sensitivity.
AI-generated from the title and abstract; the full text is not read.
Abstract
Increasing the bath temperature of the hot electron bolometer (HEB) while ensuring sensitivity could expand the application field and reduce the system complexity and cost. This study proposed and prepared a suspended NbN/Nb5N6 HEB with doubled bath temperature and undegraded sensitivity compared to NbN HEB. Under the bath temperature of 9 K, the optical noise equivalent power of the system was still of the order of pW/Hz1/2. Moreover, the influence of thermal relaxation on the device sensitivity was simulated. The results would provide a pathway for improving the bath temperature and detector sensitivity through fine adjustments of the thermal boundaries.
The authors' abstract, as published at the source. Applied Physics Letters, 2025 · DOI ↗
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Field: Astronomy and Astrophysics
Astronomy and AstrophysicsPhysics and Astronomy