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Response of Superconductor Bolometer to Phonon Fluxes

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Danilchenko B., Jasiukiewicz C., Paszkiewicz T., Wolski S.

Acta Physica Polonica A

2003

vol. 103

issue 4

325-338

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 constantα. Experiments which allow one to measureα, C, and G are proposed. The characteristic timeτ=C/G and characteristic current I_m=√{G/α} affect the effective relaxation rateΛ 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.

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1 Acta Physica Polonica A

1 2003

1 Danilchenko B.

1 Jasiukiewicz C.

1 Paszkiewicz T.

1 Wolski S.

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Response of Superconductor Bolometer to Phonon Fluxes