Self-synchronization of the modulation of energy-levels population with electrons in GaAs induced by picosecond pulses of probe radiation and intrinsic stimulated emission

Picosecond optical pumping leads to the initiation of intrinsic picosecond stimulated emission in GaAs. As was established previously, due to the interaction of pulses of probe radiation with those of intrinsic emission, the dependence of the absorption α of the probe pulse on its delay τ with respe...

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Bibliographic Details
Published in:Semiconductors (Woodbury, N.Y.) N.Y.), 2016-10, Vol.50 (10), p.1312-1321
Main Authors: Ageeva, N. N., Bronevoi, I. L., Zabegaev, D. N., Krivonosov, A. N.
Format: Article
Language:English
Subjects:
ABSORPTION
CHARGE CARRIERS
CORRELATIONS
Current carriers
ELECTRONS
ENERGY LEVELS
EQUILIBRIUM
Gallium arsenide
GALLIUM ARSENIDES
Interaction with Radiation
Investigations
Magnetic Materials
Magnetism
MATERIALS SCIENCE
MODULATION
OPTICAL PUMPING
OSCILLATIONS
Physics
Physics and Astronomy
Picosecond pulses
PROBES
Radiation (Physics)
Real time
Spectroscopy
STIMULATED EMISSION
Synchronism
SYNCHRONIZATION
Time measurement
Time synchronization
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Summary:Picosecond optical pumping leads to the initiation of intrinsic picosecond stimulated emission in GaAs. As was established previously, due to the interaction of pulses of probe radiation with those of intrinsic emission, the dependence of the absorption α of the probe pulse on its delay τ with respect to the pump pulse is modulated with oscillations. It is found that the oscillatory dependences α(τ) have a similar shape only in the case of certain combinations of energies of the interacting pulses. As a result, it is assumed that the above interaction is, in fact, a synchronization of modulations (formed by pulses) of charge-carrier populations at energy levels; this synchronization occurs in the direction of the reconstruction of detailed equilibrium. The real-time picosecond self-modulation of the absorption α is measured for the first time. The characteristics of this self-modulation as well as absorption α and intrinsic emission self-modulation characteristics measured previously by correlation methods are now accounted for by the concept of synchronization.
ISSN:1063-7826
1090-6479
DOI:10.1134/S106378261610002X