PHOTOLUMINESCENCE STUDY OF InAs/GaAs SELF-ORGANIZED QUANTUM DOTS WITH BIMODAL SIZE DISTRIBUTION

doi:10.1088/1009-1963/9/5/013

中国物理B ›› 2000, Vol. 9 ›› Issue (5): 384-388.doi: 10.1088/1009-1963/9/5/013

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

PHOTOLUMINESCENCE STUDY OF InAs/GaAs SELF-ORGANIZED QUANTUM DOTS WITH BIMODAL SIZE DISTRIBUTION

郭忠圣, 王海龙, 宁东, 封松林

State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China

收稿日期:1999-09-08 修回日期:1999-10-09 出版日期:2005-06-12 发布日期:2005-06-12
基金资助:
Project supported by the National Natural Science Foundation of China(Grant Nos. 69776016 and 19823001) and the State Key Program for Basic Research.

PHOTOLUMINESCENCE STUDY OF InAs/GaAs SELF-ORGANIZED QUANTUM DOTS WITH BIMODAL SIZE DISTRIBUTION

Guo Zhong-sheng (郭忠圣), Wang Hai-long (王海龙), Ning Dong (宁东), Feng Song-lin (封松林)

State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China

Received:1999-09-08 Revised:1999-10-09 Online:2005-06-12 Published:2005-06-12
Supported by:
Project supported by the National Natural Science Foundation of China(Grant Nos. 69776016 and 19823001) and the State Key Program for Basic Research.

摘要/Abstract

摘要： We have investigated the temperature dependence of the photoluminescence (PL) spectrum of self-organized InAs/GaAs quantum dots. A distinctive double-peak feature of the PL spectra from quantum dots has been observed, and a bimodal distribution of dot sizes has also been confirmed by scanning tunneling microscopy image for uncapped sample. The power-dependent PL study demonstrates that the distinctive PL emission peaks are associated with the ground-state emission of islands in different size branches. The temperature-dependent PL study shows that the PL quenching temperature for different dot families is different. Due to lacking of the couple between quantum dots, an unusual temperature dependence of the linewidth and peak energy of the dot ensemble photoluminescence has not been observed. In addition, we have tuned the emission wavelength of InAs QDs to 1.3 μm at room temperature.

Abstract: We have investigated the temperature dependence of the photoluminescence (PL) spectrum of self-organized InAs/GaAs quantum dots. A distinctive double-peak feature of the PL spectra from quantum dots has been observed, and a bimodal distribution of dot sizes has also been confirmed by scanning tunneling microscopy image for uncapped sample. The power-dependent PL study demonstrates that the distinctive PL emission peaks are associated with the ground-state emission of islands in different size branches. The temperature-dependent PL study shows that the PL quenching temperature for different dot families is different. Due to lacking of the couple between quantum dots, an unusual temperature dependence of the linewidth and peak energy of the dot ensemble photoluminescence has not been observed. In addition, we have tuned the emission wavelength of InAs QDs to 1.3 μm at room temperature.

中图分类号: (Structure of clean surfaces (and surface reconstruction))

68.35.B-

68.37.Ef (Scanning tunneling microscopy (including chemistry induced with STM)) 78.55.Cr (III-V semiconductors) 78.67.Hc (Quantum dots)

郭忠圣, 王海龙, 宁东, 封松林. PHOTOLUMINESCENCE STUDY OF InAs/GaAs SELF-ORGANIZED QUANTUM DOTS WITH BIMODAL SIZE DISTRIBUTION[J]. 中国物理B, 2000, 9(5): 384-388.

Guo Zhong-sheng (郭忠圣), Wang Hai-long (王海龙), Ning Dong (宁东), Feng Song-lin (封松林). PHOTOLUMINESCENCE STUDY OF InAs/GaAs SELF-ORGANIZED QUANTUM DOTS WITH BIMODAL SIZE DISTRIBUTION[J]. Chinese Physics, 2000, 9(5): 384-388.

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PHOTOLUMINESCENCE STUDY OF InAs/GaAs SELF-ORGANIZED QUANTUM DOTS WITH BIMODAL SIZE DISTRIBUTION

PHOTOLUMINESCENCE STUDY OF InAs/GaAs SELF-ORGANIZED QUANTUM DOTS WITH BIMODAL SIZE DISTRIBUTION

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