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Picosecond Transient Optical Nonlinearities in CdS and CdSSe
Author(s) -
Egorov V. D.,
Flögel P.,
Nguyen Hoang Xuan,
Kaschke M.
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.2221460138
Subject(s) - picosecond , transient (computer programming) , excited state , materials science , nonlinear system , ultrafast laser spectroscopy , nonlinear optical , optoelectronics , optics , absorption (acoustics) , spectral line , atomic physics , physics , laser , quantum mechanics , computer science , operating system
Nonlinear absorption of CdS and CdS 0.7 Se 0.3 crystals is studied around room temperature using an excite‐and‐probe technique in the ps time region and taking Fabry‐Perot interferences into account. Large nonlinear changes of the optical coefficients are obtained. The experimental spectra are in reasonable agreement with the theoretical ones assuming a heating of the excited carriers. The nonlinearities relax within about 1 ns.