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Proceedings Paper

Quasi-periodic superradiant regime of femtosecond pulse generation in quantum-well and quantum-dot semiconductor lasers
Author(s): A. A. Belyanin; V. V. Kocharovsky; Vl. V. Kocharovsky
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Paper Abstract

We propose a new type of accessible sources of ultrashort pulses based on the phenomenon of collective coherent recombination (superradiance) of electrons and holes in semiconductor heterostructures. We find and analyze a novel regime of an ultrafast operation of quantum-well or quantum- dot semiconductor lasers in which a quasiperiodic sequence of femtosecond superradiant pulses is emitted under quasi- stationary pumping. According to our calculations for AlGaAs- GaAs heterostructures, the coherent optical pulses of duration approximately greater than 30 fs and peak intensity approximately greater than 100 MW/cm2 can be generated in a low-Q cavity of length approximately 10 - 30 micrometers. It is shown that the same process of femtosecond superradiant recombination can be used for the room-temperature generation of optical coherent emission in multiple quantum-well or quantum dot GeSi/Ge structures employing direct radiative transitions from the (Gamma) -valley.

Paper Details

Date Published: 26 September 1997
PDF: 10 pages
Proc. SPIE 3239, Photon Echo and Coherent Spectroscopy, (26 September 1997); doi: 10.1117/12.287672
Show Author Affiliations
A. A. Belyanin, Institute of Applied Physics (United States)
V. V. Kocharovsky, Institute of Applied Physics (Russia)
Vl. V. Kocharovsky, Institute of Applied Physics (Russia)

Published in SPIE Proceedings Vol. 3239:
Photon Echo and Coherent Spectroscopy
Vitaly V. Samartsev, Editor(s)

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