Voltage-tunable duial-band In(Ga)As quantum-ring infrared photodetector

被引:12
作者
Dai, Jong-Horng
Lin, Y-I-Hing
Lee, Si-Chen [1 ]
机构
[1] Natl Taiwan Univ, Dept Elect Engn, Taipei 10617, Taiwan
[2] Natl Taiwan Univ, Grad Inst Elect Engn, Taipei 10617, Taiwan
关键词
dual bands infrared photodetector; quantum dots (QDs); quantum ring;
D O I
10.1109/LPT.2007.903344
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
The ten-period In(Ga)As quantum-ring infrared photodetector (QRIP) prepared by molecular beam epitaxy is investigated. The quantum rings show narrow-sized distributions that are segregated into two groups. The QRIP demonstrates a dual-band operation with response peak shifting from the long wavelength of 9.5 mu m at biases less than 0.6 V to the middle wavelength of 6.8 mu m at biases larger than 0.8 V. The maximum peak responsivity at 20 K is 422 mA/W at 1.2-V bias.
引用
收藏
页码:1511 / 1513
页数:3
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