Publication

Exciton formation rates in GaAs/AlxGa1-xAs quantum wells

Vincenzo Savona
1997
Journal Articles

Abstract

A theoretical investigation of the exciton formation process from free carriers in a single GaAs/Al1-xGaxAs quantum well is presented. The mechanism for the formation processes is provided by the interaction of the electrons and holes with phonons. The contributions from both the acoustic and optical phonons are considered. The relative importance of exciton creation from a thermalized electron-hole gas (bimolecular formation) versus a direct creation of excitons from the crystal ground state through the electromagnetic field (geminate formation) is discussed. The formation process is analyzed for different densities and temperature of the free carriers, and for different intensities of the exciting optical pump. The results compare reasonably well with recent experiments.

Official source

https://infoscience.epfl.ch/entities/publication/d4166fdd-8d48-4fb2-a658-ad0ccd270deb

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Vincenzo Savona
1997
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/d4166fdd-8d48-4fb2-a658-ad0ccd270deb

About this result

Related concepts (32)

Optical amplifier

An optical amplifier is a device that amplifies an optical signal directly, without the need to first convert it to an electrical signal. An optical amplifier may be thought of as a laser without an optical cavity, or one in which feedback from the cavity is suppressed. Optical amplifiers are important in optical communication and laser physics. They are used as optical repeaters in the long distance fiberoptic cables which carry much of the world's telecommunication links.

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Related publications (32)

Exciton formation rates in GaAs/AlxGa1-xAs quantum wells

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