Quantum dot infrared photodetectors

被引:0
|
作者
Ye, ZM [1 ]
Campbell, JC [1 ]
Chen, ZH [1 ]
Kim, ET [1 ]
Madhukar, A [1 ]
机构
[1] Univ Texas, Microelect Res Ctr, Austin, TX 78758 USA
来源
关键词
quantum dot; infrared photodetector; dark current; photoresponse; detectivity; InAs;
D O I
10.1117/12.460809
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
InAs quantum dot infrared photodetectors based on bound-to-bound intraband transitions in undoped InAs quantum dots are reported. AlGaAs blocking layers were employed to achieve low dark current. The photoresponse peaked at 6.2 mum. At 77 K and -0.7 V bias the responsivity was 14 mA/W and the detectivtiy, D*, was 10(10) cmHz(1/2)/W. By introducing InGaAs cap layers, a QDIP with bias-controllable two-color characteristic was demonstrated.
引用
收藏
页码:16 / 24
页数:9
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