Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Comparative advantages of a type-II superlattice barrier over an AlGaSb barrier for enhanced performance of InAs/GaSb LWIR nBn photodetectors

Not Accessible

Your library or personal account may give you access

Abstract

The barrier layer in InAs/GaSb LWIR nBn detector is usually composed of AlGaSb alloy, which has a non-negligible valence band offset and is sensitive to chemical solutions. In this work, we investigated a type-II superlattice (T2SL) barrier that is homogeneous with the T2SL absorber layer in order to resolve these drawbacks of the AlGaSb barrier. The lattice mismatch of the T2SL barrier was smaller than that of the AlGaSb barrier. At ${-}{{70}}\;{\rm{mV}}$ and 80 K, the dark current density and the noise equivalent temperature difference of the nBn devices with the T2SL barrier were ${4.4} \times {{1}}{{{0}}^{- 6}}\;{\rm{A}}/{\rm{cm}}^2$ and 33 mK, respectively.

© 2021 Optical Society of America

Full Article  |  PDF Article
More Like This
Multiphoton absorption in type-II InAs/GaSb superlattice structure

Chengcheng Zhao, Jianliang Huang, Biying Nie, Jinchuan Zhang, Yanhua Zhang, and Wenquan Ma
Opt. Lett. 45(1) 165-168 (2020)

Upside-down InAs/InAs1-xSbx type-II superlattice-based nBn mid-infrared photodetectors with an AlGaAsSb quaternary alloy barrier

Gongrong Deng, Xinbo Song, Mingguo Fan, Tingting Xiao, Zhibing Luo, Niu Chen, Wenyun Yang, and Yiyun Zhang
Opt. Express 28(9) 13616-13624 (2020)

Data Availability

Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (5)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved