Journal of Infrared and Millimeter Waves, Volume. 40, Issue 1, 1(2021)

Quantum well micropillar arrays with low filling factor for enhanced infrared absorption

Xin-Hui YE1,2, Tian XIE1,2, Hui XIA2, Xi-Ren CHEN2, Ju-Zhu LI2,3, Shuai-Jun ZHANG1,2, Xin-Yang JIANG2,4, Wei-Jie DENG2,4, Wen-Jing WANG2,3, Yu-Ying LI2, Wei-Wei LIU2, Fang LIU1、*, and Tian-Xin LI2、**
Author Affiliations
  • 1School of Materials Science and Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China
  • 2State Key Laboratory of Infrared Physics,Shanghai Institute of Technical Physics,Chinese Academy of Sciences,Shanghai 200083,China
  • 3Mathematics and Science College,Shanghai Normal University,Shanghai 200234,China
  • 4School of Physical Science and Technology,ShanghaiTech University,Shanghai 201210,China
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    To improve the efficiency of optical coupling and the signal-to-noise ratio of long wavelength quantum well infrared detector(LW-QWIP), we designed and fabricated a quantum well subwavelength micropillar arrays structure targeting at 8.7 μm central wavelength. Different from the reported metal or dielectric microcavity structures, each pillar contains 50 periods of quantum wells and barriers, which combined with the filling factor lower than 0.18 is expected to considerably suppress the dark current while enhancing the efficiency of light absorption. Infrared spectrum measurement discloses that the micropillar arrays reflect only 8% in the wavelength range of 8~9 μm. Our study offers a practical scheme for sensitive infrared detection at high operation temperature.

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    Xin-Hui YE, Tian XIE, Hui XIA, Xi-Ren CHEN, Ju-Zhu LI, Shuai-Jun ZHANG, Xin-Yang JIANG, Wei-Jie DENG, Wen-Jing WANG, Yu-Ying LI, Wei-Wei LIU, Fang LIU, Tian-Xin LI. Quantum well micropillar arrays with low filling factor for enhanced infrared absorption[J]. Journal of Infrared and Millimeter Waves, 2021, 40(1): 1

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    Paper Information

    Category: Research Articles

    Received: Mar. 30, 2020

    Accepted: --

    Published Online: Aug. 30, 2021

    The Author Email: Fang LIU (liufang@usst.edu.cn), Tian-Xin LI (txli@mail.sitp.ac.cn)

    DOI:10.11972/j.issn.1001-9014.2021.01.001

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