Enhanced absorption of CVD grown molybdenum disulfide monolayers via surface plasmon resonance with silver nano-triangles
Name
osac-2-4-1401.pdf
Description
Published version
Size
15.98 MB
Format
Unknown
Checksum (MD5)
29952245e416d6453f19b7b15a96246d
Author(s)
Chan, Christopher C. S.
Li, Qiang
Lai, Yun
Kong, Jing
Wong, Kam Sing
Date Issued
2019
Journal
OSA Continuum
Publisher
The Optical Society
Version
Final published version
Abstract
© 2019 Optical Society of America. Transient reflection was performed on large-area chemical vapor deposition (CVD) grown monolayer MoS2 flakes with silver nano-triangles coated on the surface to characterize its modifications to the optical properties of MoS2. Broadband transient reflection was carried out over a range of different pump wavelengths to tune in and out of the plasmonic resonance band of the nano-triangles. Large enhancement in transient reflectivity was observed, which approximately followed the plasmon resonance spectrum of the nano-triangles. Finite-difference time-domain simulationswere performed to verify that there is an increased absorption due to local surface plasmon-induced near-field enhancements. We also report observation of the dynamics of the MoS2 exciton bleaching bands, which showed subtle differences in recombination dynamics related to the exciton-plasmon coupling strength for excitation on-resonance and off-resonance at the silver nano-triangles plasmonic band.
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
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DOI of Published Version
https://doi.org/10.1364/OSAC.2.001401
