2D Material-Based Photodetectors for Infrared Imaging.

Area of Science:

• Optoelectronics
• Materials Science
• Spectroscopy

Background:

• Infrared (IR) detection and imaging is a rapidly advancing field with significant potential in spectra-chemistry, biomedicine, and artificial intelligence.
• Traditional silicon-based photodetectors face challenges in manufacturing cost and integration.
• Two-dimensional (2D) materials offer unique properties that can overcome these limitations.

Purpose of the Study:

• To review the principles of IR detection and imaging, including single-pixel and array imaging.
• To introduce promising 2D materials for broadband and specialized IR detection.
• To summarize existing IR imaging devices and strategies.

Main Methods:

• Discussion of IR detection principles.
• Overview of 2D materials for IR photodetectors.
• Summary of imaging device modes (light intensity, polarization).

Main Results:

• Dozens of 2D materials have been explored for IR photodetector fabrication.
• Ultrathin and flexible 2D material devices are easy to fabricate and integrate.
• 2D materials enable advanced IR imaging beyond current capabilities.

Conclusions:

• 2D materials are poised to revolutionize IR detection and imaging.
• These materials facilitate universal application of IR imaging, from molecular spectroscopy to artificial retinas.
• The future holds the potential for comprehensive IR imaging, revealing rich information about the world.