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4 November 2010 Direct detection behavior of a superconducting hot electron bolometer measured by Fourier transform spectrometer
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Abstract
In this paper, the direct detection behaviors of a superconducting hot electron bolometer integrated with a log spiral antenna are investigated by using Fourier Transform Spectrometer (FTS). We find the response of the bolometer to a modulated signal can be detected by a lock-in amplifier not only from the DC bias current, but also from the output noise power at the IF port of the HEB. We attribute the response in output noise power to Johnson noise and thermal fluctuation noise. Both the current response and the output noise power response measured at different bias voltages can be explained by one dimensional distributed hot spot model. In addition, the frequency response of the hot electron bolometer measured from the response in DC bias current is in good agreement with that in IF output noise power.
© (2010) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
W. Miao, W. Zhang, K. M, Zhou, Z, H. Lin, Q. J. Yao, Y. Delorme, R. Lefevre, and S. C. Shi "Direct detection behavior of a superconducting hot electron bolometer measured by Fourier transform spectrometer", Proc. SPIE 7854, Infrared, Millimeter Wave, and Terahertz Technologies, 78540B (4 November 2010); https://doi.org/10.1117/12.871759
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