High speed response of a Hot Electron Bolometer to a picosecond optical THz source and to a THz QCL comb up to 31GHz

G. Torrioli,A. Forrer,U. Senica, M. Beck,P. Carelli,F. Chiarello,J. Faist,A. Gaggero, E. Giovine,F. Martini,R. Leoni,G. Scalari,S. Cibella

2022 47TH INTERNATIONAL CONFERENCE ON INFRARED, MILLIMETER AND TERAHERTZ WAVES (IRMMW-THZ 2022)（2022）

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摘要

We have investigated the frequency response of a phonon-cooled Hot Electron Bolometer (HEB) made from an ultrathin superconducting niobium nitride film. We have used short optical pulses and a broadband spectrum analyzer to record the impulse response of the HEB. To interpret the experimental results, we have used numerical calculations based on the two temperature (2T) theoretical model.

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关键词

frequency response,phononcooled Hot Electron Bolometer,HEB,ultrathin superconducting niobium nitride film,short optical pulses,broadband spectrum analyzer,impulse response,high speed response,picosecond,THz QCL comb

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