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题名: Red luminescence from self-assembled InAlAs AlGaAs quantum dots with bimodal size distribution
作者: Zhou W;  Xu B;  Xu HZ;  Liu FQ;  Gong Q;  Jiang WH;  Sun ZZ;  Ding D;  Liang JB;  Wang ZG;  Zhu ZM;  Li GH
发表日期: 1999
摘要: Red-emitting at about 640 nm from self-assembled In0.55Al0.45As/Al0.5Ga0.5As quantum dots grown on GaAs substrate by molecular beam epitaxy are demonstrated, A double-peak structure of photoluminescence (PL) spectra from quantum dots was observed, and a bimodal distribution of dot sizes was also confirmed by an atomic force micrograph (AFM) image for uncapped sample. From the temperature and excitation intensity dependence of PL spectra, it is found that the double-peak structure of PL spectra from quantum dots is strongly correlated to the two predominant quantum dot families. Taking into account the quantum-size effect on the peak energy, it is proposed that the high (low) energy peak results from a smaller (larger) dot family, and this result is identical to the statistical distribution of dot lateral size from the AFM image.
KOS主题词: Photoluminescence;  Germanium;  Temperature;  Ensembles;  Development;  Shapes;  Dimensions
刊名: CHINESE PHYSICS LETTERS
专题: 中国科学院半导体研究所(2009年前)_期刊论文

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推荐引用方式:
Zhou W; Xu B; Xu HZ; Liu FQ; Gong Q; Jiang WH; Sun ZZ; Ding D; Liang JB; Wang ZG; Zhu ZM; Li GH .Red luminescence from self-assembled InAlAs AlGaAs quantum dots with bimodal size distribution ,CHINESE PHYSICS LETTERS,1999,16(4):298-300
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