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Microscopic theory of the extremely nonlinear terahertz response of semiconductors
Author(s) -
Golde Daniel,
Kira Mackillo,
Meier Torsten,
Koch Stephan W.
Publication year - 2011
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201000840
Subject(s) - terahertz radiation , semiconductor , nonlinear system , excitation , physics , semiconductor nanostructures , harmonic , acceleration , condensed matter physics , optics , optoelectronics , classical mechanics , quantum mechanics
The extreme nonlinear terahertz response of initially unexcited intrinsic semiconductor nanostructures is studied theoretically by solving extended semiconductor Bloch equations numerically. The coupled dynamics of intraband acceleration and multiphoton interband transitions leads to high‐harmonic generation up to several tens of the exciting terahertz frequency. It is shown that the actual cut‐off frequency is determined by the band structure and not by the excitation strength.