nn5034746_si_001.pdf (4.31 MB)

Ultrafast Transient Terahertz Conductivity of Monolayer MoS2 and WSe2 Grown by Chemical Vapor Deposition

Download (4.31 MB)
journal contribution
posted on 17.12.2015 by Callum J. Docherty, Patrick Parkinson, Hannah J. Joyce, Ming-Hui Chiu, Chang-Hsiao Chen, Ming-Yang Lee, Lain-Jong Li, Laura M. Herz, Michael B. Johnston
We have measured ultrafast charge carrier dynamics in monolayers and trilayers of the transition metal dichalcogenides MoS2 and WSe2 using a combination of time-resolved photoluminescence and terahertz spectroscopy. We recorded a photoconductivity and photoluminescence response time of just 350 fs from CVD-grown monolayer MoS2, and 1 ps from trilayer MoS2 and monolayer WSe2. Our results indicate the potential of these materials as high-speed optoelectronic materials.