Ultrafast Optical Microscopy of Single Monolayer Molybdenum Disulfide Flakes

Seo, Minah; Yamaguchi, Hisato; Mohite, Aditya D.; Boubanga-Tombet, Stephane; Blancon, Jean-Christophe; Najmaei, Sina; Ajayan, Pulickel M.; Lou, Jun; Taylor, Antoinette J.; Prasankumar, Rohit P.

doi:10.1038/srep21601

Title: Ultrafast Optical Microscopy of Single Monolayer Molybdenum Disulfide Flakes

Journal Article · Mon Feb 15 00:00:00 EST 2016 · Scientific Reports

DOI:https://doi.org/10.1038/srep21601· OSTI ID:1240610

Seo, Minah ^[1]; Yamaguchi, Hisato ^[2]; Mohite, Aditya D. ^[2]; Boubanga-Tombet, Stephane ^[3]; Blancon, Jean-Christophe ^[2]; Najmaei, Sina ^[4]; Ajayan, Pulickel M. ^[4]; Lou, Jun ^[4]; Taylor, Antoinette J. ^[2]; Prasankumar, Rohit P. ^[2]

Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Korea Inst. of Science and Technology, Seoul (Korea)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Tohoku Univ., Sendai (Japan)
Rice Univ., Houston, TX (United States)

We performed ultrafast optical microscopy on single flakes of atomically thin CVD-grown molybdenum disulfide, using non-degenerate femtosecond pump-probe spectroscopy to excite and probe carriers above and below the indirect and direct band gaps. These measurements reveal the influence of layer thickness on carrier dynamics when probing near the band gap. Furthermore, fluence-dependent measurements indicate that carrier relaxation is primarily influenced by surface-related defect and trap states after above-bandgap photoexcitation. Furthermore, the ability to probe femtosecond carrier dynamics in individual flakes can thus give much insight into light-matter interactions in these two-dimensional nanosystems.

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Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC52-06NA25396

OSTI ID:: 1240610

Report Number(s):: LA-UR-15-22919; srep21601

Journal Information:: Scientific Reports, Vol. 6; ISSN 2045-2322

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 30 works

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