Accession Number:

AD1009694

Title:

Ultrafast Intrinsic Photoresponse and Direct Evidence of Sub-Gap States in Liquid Phase Exfoliated MoS2 Thin Films

Descriptive Note:

Journal Article - Open Access

Corporate Author:

William Marsh Rice University Houston United States

Report Date:

2015-07-15

Pagination or Media Count:

11.0

Abstract:

2-Dimensional structures with swift optical response have several technological advantages, for example they could be used as components of ultrafast light modulators, photo-detectors, and optical switches. Here we report on the fast photo switching behavior of thin films of liquid phase exfoliated MoS2, when excited with a continuous laser of 658 nm E 1.88 eV, over a broad range of laser power. Transient photo-conductivity measurements, using an optical pump and THz probe OPTP, reveal that photo carrier decay follows a bi-exponential time dependence, with decay times of the order of picoseconds, indicating that the photo carrier recombination occurs via trap states.

Subject Categories:

  • Electrooptical and Optoelectronic Devices

Distribution Statement:

APPROVED FOR PUBLIC RELEASE