Room temperature high-detectivity mid-infrared photodetectors based on black arsenic phosphorus.

ABSTRACT: The mid-infrared (MIR) spectral range, pertaining to important applications, such as molecular "fingerprint" imaging, remote sensing, free space telecommunication, and optical radar, is of particular scientific interest and technological importance. However, state-of-the-art materials for MIR detection are limited by intrinsic noise and inconvenient fabrication processes, resulting in high-cost photodetectors requiring cryogenic operation. We report black arsenic phosphorus-based long-wavelength IR photodetectors, with room temperature operation up to 8.2 μm, entering the second MIR atmospheric transmission window. Combined with a van der Waals heterojunction, room temperature-specific detectivity higher than 4.9 × 10⁹ Jones was obtained in the 3- to 5-μm range. The photodetecto

SUBMITTER: Long M 

PROVIDER: S-EPMC5493419 | biostudies-literature | 2017 Jun

REPOSITORIES: biostudies-literature