Quasi-periodic superradiant regime of femtosecond pulse generation in quantum-well and quantum-dot semiconductor lasers

A. A. Belyanin; V. V. Kocharovsky; Vl. V. Kocharovsky

doi:10.1117/12.287672

26 September 1997 Quasi-periodic superradiant regime of femtosecond pulse generation in quantum-well and quantum-dot semiconductor lasers

A. A. Belyanin, V. V. Kocharovsky, Vl. V. Kocharovsky

Author Affiliations +

Proceedings Volume 3239, Photon Echo and Coherent Spectroscopy; (1997) https://doi.org/10.1117/12.287672
Event: PECS '97: Photon Echo and Coherent Spectroscopy, 1997, Yoshkar-Ola, Russian Federation

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.

Citation Download Citation

A. A. Belyanin, V. V. Kocharovsky, and Vl. V. Kocharovsky "Quasi-periodic superradiant regime of femtosecond pulse generation in quantum-well and quantum-dot semiconductor lasers", Proc. SPIE 3239, Photon Echo and Coherent Spectroscopy, (26 September 1997); https://doi.org/10.1117/12.287672

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