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Broadband Light Emission from Chirped Multiple InAs Quantum Dot Structure

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【作者】 吕雪芹金鹏陈红梅吴艳华王飞飞王占国

【Author】 LV Xue-Qin;JIN Peng;CHEN Hong-Mei;WU Yan-Hua;WANG Fei-Fei;WANG Zhan-Guo;Key Laboratory of Semiconductor Materials Science and Beijing Key Laboratory of Low-dimensional Semiconductor Materials and Devices,Institute of Semiconductors,Chinese Academy of Sciences;Pen-Tung Sah Institute of Micro-Nano Science and Technology,Xiamen University;

【机构】 Key Laboratory of Semiconductor Materials Science and Beijing Key Laboratory of Low-dimensional Semiconductor Materials and Devices,Institute of Semiconductors,Chinese Academy of SciencesPen-Tung Sah Institute of Micro-Nano Science and Technology,Xiamen University

【摘要】 Broadband light emission is obtained from a chirped multiple InAs/InGaAs/GaAs quantum dot(QD) structure.The thickness of the InGaAs strain-reducing layer(SRL) is used as the tuning parameter to adjust the light emission property of each QD layer in the chirped structure.It is shown from the photoluminescence(PL)measurement that the SRL thickness has a strong influence on the PL peak position,linewidth,and intensity.By constructing the chirped QD structure comprising five groups of QD layers with different SRL thicknesses,a broadband electroluminescence emission with the full width at half maximum of 202 nm is realized,indicating the feasibility of chirped multiple InAs QD layers on broadening the emission spectrum.

【Abstract】 Broadband light emission is obtained from a chirped multiple InAs/InGaAs/GaAs quantum dot(QD) structure.The thickness of the InGaAs strain-reducing layer(SRL) is used as the tuning parameter to adjust the light emission property of each QD layer in the chirped structure.It is shown from the photoluminescence(PL)measurement that the SRL thickness has a strong influence on the PL peak position,linewidth,and intensity.By constructing the chirped QD structure comprising five groups of QD layers with different SRL thicknesses,a broadband electroluminescence emission with the full width at half maximum of 202 nm is realized,indicating the feasibility of chirped multiple InAs QD layers on broadening the emission spectrum.

【基金】 Supported by the National Natural Science Foundation of China under Grant Nos 61274072,60976057 and 60876086;the Open Fund of Key Laboratory of Semiconductor Materials Science of Institute of Semiconductors,Chinese Academy of Sciences(No KLSMS-1105)
  • 【文献出处】 Chinese Physics Letters ,中国物理快报(英文版) , 编辑部邮箱 ,2013年11期
  • 【分类号】O471.1
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