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

**A.
V. Semenov**^{ 1},
I. A. Devyatov^{2},
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.