کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5404223 | 1505932 | 2006 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Absorption and gain spectra of optically excited semiconductor quantum wires: Effects of Coulomb correlation and screening
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
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چکیده انگلیسی
We present a systematic study on optical spectra of one-dimensional semiconductor quantum wires by solving the semiconductor Bloch equations. Many-body Coulomb interactions are substantially enhanced by strong geometrical confinement in quantum wire systems. Our theoretical calculation reveals that phase-space filling has strong influence on the absorption spectra. Increasing carrier density bleaches the exciton peak in low-density regime, and induces considerable optical gain in very high density. Band-gap renormalization is partially cancelled by reduction of exciton binding energy, which increases as the cross-section of quantum wire decreases.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volumes 119â120, JulyâOctober 2006, Pages 468-472
Journal: Journal of Luminescence - Volumes 119â120, JulyâOctober 2006, Pages 468-472
نویسندگان
Ping Huai, Tetsuo Ogawa,