ABSORPTION OF TERAHERTZ ELECTROMAGNETIC RADIATION IN DIRTY SUPERCONDUCTOR AT ARBITRARY SPECTRAL FUNCTIONS

 A. V. Semenov ¹, I. A. Devyatov², S. A. Ryabchun ¹, S. N. Maslennikov ¹, A.S. Maslennikova ¹, P. A. Larionov ¹, B. M. Voronov ¹, G. M. Chulkova ¹

¹ Moscow State Pedagogical University

² Skobelitsyn Institute of Nuclear Physics, Moscow State University

Received October 6, 2011

 

Abstract. A problem of absorption of high-frequency electromagnetic field in dirty superconductor is treated within Keldysh technic. Expression for the source term in the kinetic equation for quasiparticle distribution function is derived. The result is significant for deriving a consistent microscopic theory of superconducting detectors for terahertz frequency range, perspective detectors on kinetic inductance of current-biased superconducting strip and on Josephson inductance of tunnel.

Keywords: terahertz electromagnetic radiation, superconductors, detectors of  terahertz range.

words: OFDM signals, pilot-based channel estimation, two-dimensional Wiener filtering, Kronecker type splitting.