| Response of Superconductor Bolometer to Phonon Fluxes |
| B.A. Danilchenko a , Cz. Jasiukiewicz b , T. Paszkiewicz c and S. Wolski c a Institute of Physics, National Academy of Sciences of Ukraine, Prospect Nauki 46, 252650 Kiev, Ukraine b Chair of Physics, Rzeszów University of Technology, Pola 2, 35-959 Rzeszów, Poland c Institute of Physics, University of Rzeszów, Rejtana 16A, 35-310 Rzeszów, Poland |
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| Received: September 30, 2002; revised version December 9, 2002; in final form February 20, 2003 |
| A metallic film bolometer with heat capacity C is in contact with thermal bath and with crystalline specimen and is biased by a constant current I b . The thermal contact of the bolometer is characterized by the thermal conductance G. The bolometer operates in the linear regime of dependence of resistance on temperature characterized by a constant α. Experiments which allow one to measure α,C, and G are proposed. The characteristic time τ=C/G and characteristic current I m =(G /α) 1/2 affect the effective relaxation rate Λ of the bolometer resistance R b (t). The knowledge of the power W(t) absorbed by detector allows one to calculate R b (t). The inverse problem of calculation of W(t) from known R b (t) is also solved. The suitable algorithms are proposed. Deconvoluted absorbed power is obtained for experiments performed on GaAs and compared with phonoconductivity signal of two-dimensional electron gas structure as well as with results of Monte Carlo computer experiments. |
| DOI: 10.12693/APhysPolA.103.325 PACS numbers: 07.57.Kp, 02.30.Hq, 66.70.+f |