Picosecond detection and broadband mixing of near-infrared radiation by YBaCuO films

Boris S. Karasik; Mikael Lindgren; Michael A. Zorin; Martin Danerud; Dag Winkler; Vladimir V. Trifonov; Gregory N. Gol'tsman; Eugeni M. Gershenzon

doi:10.1117/12.176131

20 May 1994 Picosecond detection and broadband mixing of near-infrared radiation by YBaCuO films

Boris S. Karasik, Mikael Lindgren, Michael A. Zorin, Martin Danerud, Dag Winkler, Vladimir V. Trifonov, Gregory N. Gol'tsman, Eugeni M. Gershenzon

Author Affiliations +

Proceedings Volume 2159, High-Temperature Superconducting Detectors: Bolometric and Nonbolometric; (1994) https://doi.org/10.1117/12.176131
Event: OE/LASE '94, 1994, Los Angeles, CA, United States

Abstract

Nonequilibrium picosecond and bolometric responses of YBCO films 500 angstroms thick patterned into 20 X 20 micrometers ² size structure to 17 ps laser pulses and modulated radiation of GaAs and CO₂ lasers have been studied. The modulation frequencies up to 10 GHz for GaAs laser and up to 1 GHz for CO₂ were attained. The use of small radiation power (1 - 10 mW/cm² for cw radiation and 10 - 100 nJ/cm² for pulse radiation) in combination with high sensitive read-out system made possible to avoid any non-linear transient processes caused by an overheating of sample above a critical temperature or S-N switching enhanced by an intense radiation. Responses due to the change of kinetic inductance were believed to be negligible. The only signals observed were caused by a small change of the film resistance either in the resistive state created by a bias current or in the normal state. The data obtained by means of pulse and modulation techniques are in agreement. The responsivity about 1 V/W was measured at 1 GHz modulation frequency both for 0.85 micrometers and 10.6 micrometers wavelengths. The sensitivity of high-T_c fast wideband infrared detector is discussed.

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Boris S. Karasik, Mikael Lindgren, Michael A. Zorin, Martin Danerud, Dag Winkler, Vladimir V. Trifonov, Gregory N. Gol'tsman, and Eugeni M. Gershenzon "Picosecond detection and broadband mixing of near-infrared radiation by YBaCuO films", Proc. SPIE 2159, High-Temperature Superconducting Detectors: Bolometric and Nonbolometric, (20 May 1994); https://doi.org/10.1117/12.176131

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