@article{6b2e9aebcd0342fe8717f6773ef0a46c,
title = "Enhanced normal-incident absorption of quantum-dot infrared photodetectors with smaller quantum dots",
abstract = "Ten-period InAs-GaAs quantum-dot (QD) infrared photodetectors grown under different In adatom supply procedures are investigated. Two In adatom supply procedures of In shutter 1) always opened and 2) periodically opened/closed are adopted in this letter. Larger QD sizes in both height and diameter and more uniform size distribution are observed for samples grown under an In shutter periodically opened/closed condition. The device with QDs grown under the In shutter always opened condition has revealed shorter detection wavelengths and enhanced normal incident absorption. The phenomenon shows that beside the increase of energy difference between confinement states, smaller QD sizes would also enhance the normal incident absorption predicted for the theoretically zero-dimensional QD structures.",
keywords = "Quantum dot (QD), Quantum-dot infrared photodetector (QDIP)",
author = "Tseng, {Chi Che} and Chou, {Shu Ting} and Chen, {Yi Hao} and Chen, {Cheng Nan} and Lin, {Wei Hsun} and Chung, {Tung Hsun} and Lin, {Shih Yen} and Chiu, {Pei Chin} and Chyi, {Jen Inn} and Wu, {Meng Chyi}",
note = "Funding Information: Manuscript received March 31, 2008; revised April 24, 2008. C.-C. Tseng, Y.-H. Chen, C.-N. Chen, W.-H. Lin, T.-H. Chung, and M.-C. Wu are with the Department of Electrical Engineering, National Tsing Hua University, Hsinchu 300, Taiwan, R.O.C. This work was supported in part by the National Science Council, Taiwan, under Grant NSC 96-2221-E-001 -030. S.-T. Chou is with the Research Center for Applied Sciences, Academia Sinica, Taipei 11529, Taiwan, R.O.C. S.-Y. Lin is with the Research Center for Applied Sciences, Academia Sinica, Taipei 11529, Taiwan, R.O.C., and also with the Department of Photonics, National Chiao-Tung University, Hsinchu 300, Taiwan, R.O.C. (e-mail: shihyen@gate.sinica.edu.tw). P.-C. Chiu and J.-I. Chyi are with the Department of Electrical Engineering, National Central University, Jhongli 32001, Taiwan, R.O.C. Color versions of one or more of the figures in this letter are available online at http://ieeexplore.ieee.org. Digital Object Identifier 10.1109/LPT.2008.926020",
year = "2008",
month = jul,
day = "15",
doi = "10.1109/LPT.2008.926020",
language = "???core.languages.en_GB???",
volume = "20",
pages = "1240--1242",
journal = "IEEE Photonics Technology Letters",
issn = "1041-1135",
number = "14",
}