Bolometric response of optically thick superconducting films

Author

Chern, J.D. ; Yang, H.C. ; Genchev, Z.D. ; Horng, H.E. ; Dew-Hughes, D.

Author_Institution

Dept. of Phys., Nat. Taiwan Univ., Taipei, Taiwan

Volume

7

Issue

2

fYear

1997

fDate

6/1/1997 12:00:00 AM

Firstpage

2367

Lastpage

2370

Abstract

A one-dimensional heat conduction model is established to interpret the chopping frequency dependence of the bolometric response of optically thick superconducting films. The key feature of this model is that it takes into account the thermal boundary conductance of both the film/substrate and the substrate/heat-sink interfaces. The model is found to be suitable for both the strong and weak thermal coupling cases. By comparing the results with a simplified bolometric model, explicit expressions of the thermal conductance, thermal capacitance, radiation absorption efficiency and response time constant of the bolometric system have been deduced, where the influences of the film, substrate and the heat conduction boundaries are all considered.

Keywords

bolometers; heat conduction; superconducting thin films; thermal conductivity; bolometric response; chopping frequency; film/substrate interface; one-dimensional heat conduction model; optically thick superconducting film; radiation absorption efficiency; response time constant; substrate/heat-sink interface; thermal boundary conductance; thermal capacitance; thermal conductance; thermal coupling; Absorption; Capacitance; Conductive films; Delay; Frequency dependence; Optical coupling; Optical films; Physics; Superconducting films; Thermal conductivity;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.621715

Filename

621715