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Theory of the Optical Stark Effect in Semiconductors under Ultrashort‐Pulse Excitation
Author(s) -
Lindberg M.,
Koch S. W.
Publication year - 1988
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.2221500205
Subject(s) - femtosecond , excitation , semiconductor , coherence (philosophical gambling strategy) , physics , polarization (electrochemistry) , atomic physics , stark effect , ultrashort pulse , pulse (music) , coherence time , electron , optics , laser , quantum mechanics , electric field , chemistry , detector
The optical Stark effect is computed for femtosecond excitation of the electron–hole‐pair states in semiconductors. The theory is based on the effective Bloch equations for semiconductors and is evaluated for the large detuning, low intensity limit. For the example of CdS, good agreement with recent femtosecond experiments is found. It is shown that the coherent interaction of the pulses and the medium polarization dominates the semiconductor response as long as the pulse duration is of the order of, or less than, the coherence decay time of the medium.