Picosecond
self-modulation of the fundamental absorption of a light pulse in the GaAs, that
generates the stimulated emission, causing interband electron
oscillations
N. N. Ageeva, I. L.
Bronevoi, A. N. Krivonosov, D.N. Zabegaev
Kotelnikov Institute of Radioengineering
and Electronics of Russian Academy of Sciences,
Mokhovaya 11-7, Moscow 125009,
Russia
The paper is received on March 25, 2019
Abstract. A brief review of
experimental results is presented on discovery
of a
new nonlinear phenomenon – picosecond self-modulation of the fundamental
absorption of a picosecond probe light pulse in a thin layer of GaAs that
generates stimulated intense picosecond emission. It is explained by
the synchronization of two modulations of the electron population of energy
levels in the conduction band. One is created by the probing light. The other
is created at the bottom of the zone by picosecond interband oscillations of
electrons in the emission field and is transmitted up the zone to restore the
detailed equilibrium of electron transitions with the radiation and absorption
of LO phonons. Synchronization of modulations occurs in order to achieve similar
detailed equilibrium.
Key
words: picosecond, self-modulation, fundamental
light absorption, stimulated emission, synchronization, interband electron
oscillations, GaAs.
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