Abstract
Polarization detection in the short-wave infrared (SWIR) region presents broad applications in target-background contrast enhancement, underwater imaging, material classification, etc. A mesa structure can prevent electrical cross talk due to its intrinsic advantages, making it potentially suited to meet the need for manufacturing smaller-sized devices to save cost and shrink volume. In this Letter, mesa-structured InGaAs PIN detectors with a spectral response ranging from 900 nm to 1700 nm and a detectivity of 6.28 × 1011 cm·Hz1/2/W at 1550 nm and –0.1 V bias (room temperature) have been demonstrated. Furthermore, the devices with subwavelength gratings in four orientations show obvious polarization performance. Their extinction ratios (ERs) can reach 18:1 at 1550 nm and their transmittances are over 90%. Such a polarized device with a mesa structure could realize miniaturized SWIR polarization detection.
© 2022 Optica Publishing Group
Full Article | PDF ArticleCorrections
5 May 2023: A typographical correction was made to an author affiliation.
More Like This
Duo Sun, Bo Feng, Bo Yang, Tao Li, Xiumei Shao, Xue Li, and Yifang Chen
Opt. Lett. 45(6) 1559-1562 (2020)
Jishen Zhang, Haibo Wang, Gong Zhang, Kian Hua Tan, Satrio Wicaksono, Haiwen Xu, Chao Wang, Yue Chen, Yan Liang, Charles Ci Wen Lim, Soon-Fatt Yoon, and Xiao Gong
Opt. Lett. 46(11) 2670-2673 (2021)
Duo Sun, Tao Li, Bo Yang, Xiumei Shao, Xue Li, and Yifang Chen
Opt. Express 27(7) 9447-9458 (2019)