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Saturation of Band‐Tail Absorption in Multiple Quantum Wells and Its Link with the Nonlinear Index Saturation
Author(s) -
Raj R.,
Sfez B. G.,
Pellat D.,
Oudar J.L.
Publication year - 1992
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.2221730147
Subject(s) - saturation (graph theory) , nonlinear system , quantum well , quantum , materials science , condensed matter physics , optics , physics , laser , quantum mechanics , mathematics , combinatorics
Abstract A pump and probe measurement of the nonlinear transmission reveals that the origin of the saturating behaviour of the nonlinear index δ n NL observed in the band tail of GaAs/GaAlAs multiple quantum wells is due to the saturation of the photoexcited carrier density.