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Published on: May 3, 2011
High-Sensitive Uncooled Mid-Wave Infrared Detector Based on TiS3 Nanoribbon
Zhangyu Cao1, Le Ju1, Binbin Wei1
1Information Materials and Intelligent Sensing Laboratory of Anhui Province, Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Institutes of Physical Science and Information Technology, Anhui University, 111 Jiu Long Road, Hefei, 230601, China.
Researchers developed a titanium trisulfide nanoribbon photodetector for mid-wave infrared (MWIR) detection. This device offers ultra-broadband response, high sensitivity, and exceptionally fast speeds for advanced imaging and communication applications.
Area of Science:
- Materials Science
- Optoelectronics
- Nanotechnology
Background:
- High-sensitive, fast mid-wave infrared (MWIR) photodetectors are crucial for applications like biomedical imaging, optical communication, and night vision.
- Low-dimensional materials are promising for MWIR detection due to their potential for low dark current and broadband photoresponse.
Purpose of the Study:
- To report a high-performance MWIR photodetector utilizing a titanium trisulfide (TiS3) nanoribbon.
- To characterize the photodetector's photoresponse spectrum, responsivity, specific detectivity, and response speed in the MWIR range.
Main Methods:
- Fabrication of a photodetector device using a titanium trisulfide (TiS3) nanoribbon.
- Measurement of the photodetector's photoresponse across a broad spectrum (visible to MWIR).
- Characterization of key performance metrics including photoresponsivity, specific detectivity, and response times (rise and decay) in ambient air.
Main Results:
- The TiS3 nanoribbon photodetector exhibited an ultra-broadband photoresponse from 405 nm to 4275 nm.
- In the MWIR range, the device achieved a photoresponsivity of 21.1 A/W and a specific detectivity of 5.9 × 10^10 cmHz^1/2/W.
- Achieved fast MWIR response speeds with rise time (τr) of 1.3 ms and decay time (τd) of 1.5 ms, significantly faster than the thermal time constant.
Conclusions:
- Titanium trisulfide (TiS3) nanoribbons are suitable for developing high-performance MWIR photodetectors.
- The demonstrated device offers a compelling combination of ultra-broadband detection, high sensitivity, and rapid response speed.
- These findings represent a significant advancement towards practical, room-temperature MWIR photodetectors for various technological applications.
