Physics – Condensed Matter
Scientific paper
2002-04-25
Physics
Condensed Matter
7 pages, 4 figures
Scientific paper
Based on the quantum transport equation for the electron-phonon system, the absorption coefficient of sound (acoustic phonons) by absorption of laser radiation in cylindrical quantum wires is calculated for the case of monophoton absorption process and the case of multiphoton absorption process. Analytical expressions and conditions for the absorption of sound are obtained. Differences between the two cases of monophoton absorption and of multiphoton absorption are discussed; numerical computations and plots are carried out for a GaAs/GaAsAl quantum wire. The results are compared with bulk semiconductors and quantum wells.
Bau Nguyen Quang
Hung Nguyen Quoc
Nhan Nguyen Vu
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