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Title: Single plasmonic structure enhanced dual-band room temperature infrared photodetection
Authors: Tong, Jinchao
Luo, Yu
Zhang, Dawei
Zhang, Dao Hua
Tobing, Landobasa Yosef Mario
Keywords: Dual-band Photodetection
Surface Plasmon Polaritons (SPPs)
Issue Date: 2018
Source: Tong, J., Tobing, L. Y. M., Luo, Y., Zhang, D., & Zhang, D. H. (2018). Single plasmonic structure enhanced dual-band room temperature infrared photodetection. Scientific Reports, 8(1), 1548-.
Series/Report no.: Scientific Reports
Abstract: Dual-band photodetection in mid- and near-wave infrared spectral bands is of scientific interest and technological importance. Most of the state-of-the-art mid-infrared photodetectors normally operate at low temperature and/or suffer from toxicity and high cost due to limitations of material properties and device structures. The capability of surface plasmons in confining electromagnetic waves into extremely small volume provides an opportunity for improving the performance for room temperature operation. Here, we report an n-InAsSb/n-GaSb heterostructure photodiode integrated with plasmonic two-dimensional subwavelength hole array (2DSHA) for room temperature two band photodetection. We demonstrate that with a properly designed 2DSHA, room temperature detectivities of the heterostructure device can be enhanced to ~1.4 × 109 Jones and ~1.5 × 1011 Jones for the two bands peaked at 3.4 μm and 1.7 μm, respectively. In addition, we study the photocurrent enhancement in both photoconductor and heterojunction modes in the same integrated structure. The demonstration of single 2DSHA enhanced heterojunction photodiode brings a step closer to high sensitivity room temperature devices and systems which require multiband absorption.
ISSN: 2045-2322
DOI: 10.1038/s41598-018-20028-6
Schools: School of Electrical and Electronic Engineering 
Rights: © 2018 The Author(s) (Nature Publishing Group). This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Journal Articles

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