Ultrafast Field-Dependent Response of Bandedge Photogenerated Electrons in Quantum-Well Structures

Ravindra P. Joshi; Robert O. Grondin; Samir M. El-Ghazaly

doi:10.1109/3.159552

Ultrafast Field-Dependent Response of Bandedge Photogenerated Electrons in Quantum-Well Structures

Ravindra P. Joshi, Robert O. Grondin, Samir M. El-Ghazaly

Electrical and Computer Engineering

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

We analyze the field-dependent femtosecond dynamics of bandedge photogenerated electrons undergoing parallel transport in quantum-well structures. the intracollisional field effect, breakdown of the Fermi golden rule, quantization of the phonon modes, and transient charge variations are all comprehensively included. Our electron heating rates at zero fields are in agreement with experiments. the results are indicative of an adequate description of the electron-phonon interaction in two-dimensional systems. At high fields we observe an energy overshoot structure in keeping with recently observed data, without any real-space transfer.

Original language	English
Pages (from-to)	2456-2463
Number of pages	8
Journal	IEEE Journal of Quantum Electronics
Volume	28
Issue number	10
DOIs	https://doi.org/10.1109/3.159552
State	Published - 1992

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abstract = "We analyze the field-dependent femtosecond dynamics of bandedge photogenerated electrons undergoing parallel transport in quantum-well structures. the intracollisional field effect, breakdown of the Fermi golden rule, quantization of the phonon modes, and transient charge variations are all comprehensively included. Our electron heating rates at zero fields are in agreement with experiments. the results are indicative of an adequate description of the electron-phonon interaction in two-dimensional systems. At high fields we observe an energy overshoot structure in keeping with recently observed data, without any real-space transfer.",

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AB - We analyze the field-dependent femtosecond dynamics of bandedge photogenerated electrons undergoing parallel transport in quantum-well structures. the intracollisional field effect, breakdown of the Fermi golden rule, quantization of the phonon modes, and transient charge variations are all comprehensively included. Our electron heating rates at zero fields are in agreement with experiments. the results are indicative of an adequate description of the electron-phonon interaction in two-dimensional systems. At high fields we observe an energy overshoot structure in keeping with recently observed data, without any real-space transfer.

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Ultrafast Field-Dependent Response of Bandedge Photogenerated Electrons in Quantum-Well Structures

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