Ultrafast Optical Microscopy of Single Monolayer Molybdenum Disulfide Flakes
- Ultrafast Optical Microscopy of Single Monolayer Molybdenum Disulfide Flakes
- 서민아; Hisato Yamaguchi; Aditya D. Mohite; Stephane Boubanga-Tombet; Jean-Christophe Blancon; Sina Najmaei; Pulickel M. Ajayan; Jun Lou; Antoinette J. Taylor; Rohit P. Prasankumar
- Issue Date
- Scientific Reports
- VOL 6, NO 21601, 1-7
- We have 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, fluencedependent measurements indicate that carrier relaxation is primarily influenced by surface-related defect and trap states after above-bandgap photoexcitation. The ability to probe femtosecond carrier dynamics in individual flakes can thus give much insight into light-matter interactions in these twodimensional nanosystems.
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