Resonant Cavity Enhanced Photodiodes in the Short-Wave Infrared for Spectroscopic Detection

Bainbridge, Andrew and Mamic, Katarina and Hanks, Laura and Al-Saymari, Furat and Craig, Adam and Marshall, Andrew (2020) Resonant Cavity Enhanced Photodiodes in the Short-Wave Infrared for Spectroscopic Detection. IEEE Photonics Technology Letters, 32 (21). pp. 1369-1372. ISSN 1041-1135

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Abstract

The design, fabrication and characterization of resonant cavity enhanced photodiodes for the short-wave infrared has been investigated. An InGaAsSb absorber and AlGaSb barrier were used in an nBn structure, within a Fabry-Perot cavity bounded by AlAsSb/GaSb DBR mirrors. The resonant cavity design produced a narrow response at 2.25 μm, with a FWHM of ∼ 26 nm and peak responsivity of 0.9 A/W. The photodiodes exhibited high specific detectivities and low leakage currents at 300 K - 5×10^10 cmHz^1/2W^−1 and 0.2 mAcm^−2 respectively, with an applied bias voltage of −100 mV. A maximum specific detectivity of 1×10^11 cmHz^1/2W^−1 was achieved at 275 K and the detector continued to perform well at high temperatures - at 350 K the peak specific detectivity was 3×10^9 cmHz^1/2W^−1. The narrow resonant response of these detectors make them suitable for spectroscopic sensing, demonstrated by measurements of glucose concentrations in water. Concentrations as low as 1 % were discriminated, limited only by the associated electronic systems.

Item Type:
Journal Article
Journal or Publication Title:
IEEE Photonics Technology Letters
Additional Information:
©2020 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2500/2504
Subjects:
?? remote sensingspectroscopyinfrared detectorsphotodetectorselectronic, optical and magnetic materialsatomic and molecular physics, and opticselectrical and electronic engineering ??
ID Code:
150021
Deposited By:
Deposited On:
04 Jan 2021 14:10
Refereed?:
Yes
Published?:
Published
Last Modified:
04 Feb 2024 00:51