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Coherent Pulse Breakup in Femtosecond Pulse Propagation in Semiconductors
Author(s) -
Peyghambarian N.,
Harten P. A.,
Knorr A.,
Lee S. G.,
Jin R.,
Brown Colstoun F. De,
Wright E. M.,
Khitrova G.,
Gibbs H. M.,
Koch S. W.
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.2221730105
Subject(s) - dephasing , breakup , exciton , femtosecond , excitation , pulse (music) , physics , biexciton , femtosecond pulse , optics , femtosecond pulse shaping , atomic physics , condensed matter physics , laser , quantum mechanics , detector , mechanics
Coherent pulse breakup is observed for below‐exciton resonance femtosecond excitation in a room‐temperature GaAs/AlGaAs multiple quantum well waveguide using the cross‐correlation technique. This pulse breakup is present only for large area pulses with durations less than the dephasing time of the closest exciton. For pulses longer than the exciton dephasing times, but with the same and even larger areas, the pulse breakup is not observed. The breakup is due to neither self‐induced transparency nor temperoral soliton. Instead, calculations based on the coupled semiconductor Maxwell‐Bloch equations show that coherent self‐phase modulation during propragation drives the system out of the initial adiabatic following regime into oscillatory excitation density, and eventually, pulse shape modulations.

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