Near-Infrared Polarimetric Image Sensors Based on Ordered Sulfur-Passivation GaSb Nanowire Arrays
Author(s): Zhang, K (Zhang, Kai); Ren, ZH (Ren, Zhihui); Cao, HC (Cao, Huichen); Li, LL (Li, Lingling); Wang, Y (Wang, Ying); Zhang, W (Zhang, Wei); Li, YB (Li, Yubao); Yang, HT (Yang, Haitao); Meng, Y (Meng, You); Ho, JC (Ho, Johnny C.); Wei, ZM (Wei, Zhongming); Shen, GZ (Shen, Guozhen)
Source: ACS NANO DOI: 10.1021/acsnano.2c01455 Early Access Date: MAY 2022
Abstract: The near-infrared polarimetric image sensor has a wide range of applications in the military and civilian fields, thus developing into a research hotspot in recent years. Because of their distinguishing 1D structure features, the ordered GaSb nanowire (NW) arrays possess potential applications for near-infrared polarization photodetection. In this work, single-crystalline GaSb NWs are synthesized through a sulfur-catalyzed chemical vapor deposition process. A sulfur-passivation thin layer is formed on the NW surface, which prevents the GaSb NW core from being oxidized. The photodetector based on sulfur-passivation GaSb (S-GaSb) NWs has a lower dark current and higher responsivity than that built with pure GaSb NWs. The photodetector exhibits a large responsivity of 9.39 x 10(2) A/W and an ultrahigh detectivity of 1.10 x 10(11) Jones for 1.55 mu m incident light. Furthermore, the dichroic ratio of the device is measured to reach 2.65 for polarized 1.55 mu m light. Through a COMSOL simulation, it is elucidated that the origin of the polarized photoresponse is the attenuation of a light electric field inside the NW when the angle of incident polarization light rotates. Moreover, a flexible polarimetric image sensor with 5 x 5 pixels is successfully constructed on the ordered S-GaSb NW arrays, and it exhibits a good imaging ability for incident near-infrared polarization light. These good photoresponse properties and polarized imaging abilities can empower ordered S-GaSb NW arrays with technological potentials in next-generation large-scale near-infrared polarimetric imaging sensors.
Accession Number: WOS:000821354700001
PubMed ID: 35511070
Author Identifiers:
Author Web of Science ResearcherID ORCID Number
Li, Yubao AEF-9707-2022
Ho, Johnny C K-5275-2012 0000-0003-3000-8794
Li, Yubao 0000-0002-0979-8747
Meng, You L-4165-2017 0000-0002-5385-4080
ISSN: 1936-0851
eISSN: 1936-086X
