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

被引：3

作者：

Bainbridge, Andrew ^{[1
]}

Mamic, Katarina ^{[1
]}

Hanks, Laura A. ^{[1
]}

Al-Saymari, Furat ^{[1
]}

Craig, Adam P. ^{[1
]}

Marshall, Andrew R. J. ^{[1
]}

机构：

[1] Univ Lancaster, Dept Phys, Lancaster LA1 4YW, England

来源：

IEEE PHOTONICS TECHNOLOGY LETTERS | 2020年 / 32卷 / 21期

基金：

英国工程与自然科学研究理事会;

关键词：

Temperature measurement; Cavity resonators; Detectors; Sugar; Absorption; Temperature dependence; Remote sensing; spectroscopy; infrared detectors; photodetectors; INAS;

D O I：

10.1109/LPT.2020.3025977

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

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 mu m, with a FWHM of similar to 26 nm and peak responsivity of 0.9 A/W. The photodiodes exhibited high specific detectivities and low leakage currents at 300 K - 5 x 10(10) cmHz(1/2)W(-1) and 0.2 mAcm(-2) respectively, with an applied bias voltage of -100 mV. A maximum specific detectivity of 1x10(11) cmHz(1/2)W(-1) was achieved at 275 K and the detector continued to perform well at high temperatures - at 350 K the peak specific detectivity was 3x10(9) cmHz(1/2)W(-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.

引用

页码：1369 / 1372

页数：4

共 25 条

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