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Optical and Quantum Electronics

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01-09-2018

Theoretical investigation of hot electron cooling process in GaAs/AlAs cylindrical quantum wire under the influence of an intense electromagnetic wave

Authors: Khang D. Pham, Chuong V. Nguyen, Nguyen N. Hieu, Huynh V. Phuc, Bui D. Hoi, Bui M. H. Hoa, Le T. T. Phuong

Published in: Optical and Quantum Electronics | Issue 9/2018

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Abstract

Hot electrons cooling by phonons in GaAs/AlAs cylindrical quantum wire (CQW), under the influence of an intense electromagnetic wave (EMW), is studied theoretically. Analytic expression for the electron cooling power (CP) is derived from the quantum transport equation for phonons, using the Hamiltonian of interacting electron–optical phonon system. Both photon absorption and emission processes are considered. Numerical results show that the CP reaches maximum when the energy difference between electronic subbands equals the energy of an optical phonon plus the photon energy. Under the influence of the EMW, the negative CP is observed showing that electrons gain energy from phonon and photon instead of losing their energy. Also, the CP increases with increasing the EMW amplitude. Our results theoretically clarify the mechanism of the electron cooling process by phonons in the GaAs/AlAs CQW under the EMW, which is of significance for designing and fabricating high-speed nanoelectronic devices based on this material.

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Title: Theoretical investigation of hot electron cooling process in GaAs/AlAs cylindrical quantum wire under the influence of an intense electromagnetic wave
Authors: Khang D. Pham
Chuong V. Nguyen
Nguyen N. Hieu
Huynh V. Phuc
Bui D. Hoi
Bui M. H. Hoa
Le T. T. Phuong
Publication date: 01-09-2018
Publisher: Springer US
Published in: Optical and Quantum Electronics / Issue 9/2018
Print ISSN: 0306-8919
Electronic ISSN: 1572-817X
DOI: https://doi.org/10.1007/s11082-018-1606-x

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