Superradiant generation of femtosecond pulses in low-dimensional semiconductor heterostructures

A. A. Belyanin; V. V. Kocharovsky; Vl. V. Kocharovsky; N. G. Kalugin

doi:10.1117/12.340116

25 February 1999 Superradiant generation of femtosecond pulses in low-dimensional semiconductor heterostructures

A. A. Belyanin, V. V. Kocharovsky, Vl. V. Kocharovsky, N. G. Kalugin

Proceedings Volume 3736, ICONO '98: Quantum Optics, Interference Phenomena in Atomic Systems, and High-Precision Measurements; (1999) https://doi.org/10.1117/12.340116
Event: ICONO '98: Laser Spectroscopy and Optical Diagnostics: Novel Trends and Applications in Laser Chemistry, Biophysics, and Biomedicine, 1998, Moscow, Russian Federation

Abstract

A new type of accessible source of ultrashort optical pulses, based on the phenomenon of collective coherent recomination (superfluorescence) of electrons and holes in semiconductor heterostructures is proposed. The novel regime of an ultrafast operation of quantum-well semiconductor lasers with a low-Q cavity of length approximately 30 $min 100(mu) is analyzed, in which a quasiperiodic sequence of superradiant pulses of duration up to 30 fs and peak intensity exceeding 100 MW/cm² is emitted under continuous pumping, with typical current density of order 10⁴ A/cm². 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 T-valley.

Citation Download Citation

A. A. Belyanin, V. V. Kocharovsky, Vl. V. Kocharovsky, and N. G. Kalugin "Superradiant generation of femtosecond pulses in low-dimensional semiconductor heterostructures", Proc. SPIE 3736, ICONO '98: Quantum Optics, Interference Phenomena in Atomic Systems, and High-Precision Measurements, (25 February 1999); https://doi.org/10.1117/12.340116

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