激光线宽
激子
声子
凝聚态物理
杂质
发光
量子阱
物理
大气温度范围
原子物理学
材料科学
光学
量子力学
激光器
气象学
作者
Johnson Lee,Emil S. Köteles,M. O. Vassell
出处
期刊:Physical review
[American Physical Society]
日期:1986-04-15
卷期号:33 (8): 5512-5516
被引量:470
标识
DOI:10.1103/physrevb.33.5512
摘要
We present detailed experimental studies and a theoretical model of the linewidth as a function of temperature (<150 K) for both heavy-hole and light-hole excitons in a GaAs-${\mathrm{Al}}_{\mathrm{x}}$${\mathrm{Ga}}_{1\mathrm{\ensuremath{-}}\mathrm{x}}$As quantum well. The contributions to the linewidth of the exciton luminescence include interactions with polar optical phonons, with acoustic phonons (via deformation and piezoelectric potentials), with ionized impurities, and with fluctuations in the thickness of the well. We find that the linewidth increases sublinearly with temperature in the range 0 K to about 70 K but increases more sharply as the temperature is raised still higher.
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