Nonlinear optical characteristics of monolayer MoSe2
- Authors
- Le, Chinh Tam; Clark, Daniel J.; Ullah, Farman; Senthilkumar, Velusamy; Jang, Joon I.; Sim, Yumin; Seong, Maeng-Je; Chung, Koo-Hyun; Park, Hyoyeol; Kim, Yong Soo
- Issue Date
- Aug-2016
- Publisher
- WILEY-V C H VERLAG GMBH
- Keywords
- MoSe2 monolayer; nonlinear optics; second-order susceptibility; laser-induced damage threshold
- Citation
- ANNALEN DER PHYSIK, v.528, no.7-8, pp 551 - 559
- Pages
- 9
- Journal Title
- ANNALEN DER PHYSIK
- Volume
- 528
- Number
- 7-8
- Start Page
- 551
- End Page
- 559
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/6717
- DOI
- 10.1002/andp.201600006
- ISSN
- 0003-3804
1521-3889
- Abstract
- In this study, we utilized picosecond pulses from an Nd:YAG laser to investigate the nonlinear optical characteristics of monolayer MoSe2. Two-step growth involving the selenization of pulsed-laser-deposited MoO3 film was employed to yield the MoSe2 monolayer on a SiO2/Si substrate. Raman scattering, photoluminescence (PL) spectroscopy, and atomic force microscopy verified the high optical quality of the monolayer. The second-order susceptibility.(2) was calculated to be similar to 50 pm V-1 at the second harmonic wavelength lambda(SHG)similar to 810 nm, which is near the optical gap of the monolayer. Interestingly, our wavelength-dependent second harmonic scan can identify the bound excitonic states including negatively charged excitons much more efficiently, compared with the PL method at room temperature. Additionally, the MoSe2 monolayer exhibits a strong laser-induced damage threshold similar to 16 GW cm(-2) under picosecond-pulse excitation. Our findings suggest that monolayer MoSe2 can be considered as a promising candidate for high-power, thin-film-based nonlinear optical devices and applications.
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Collections - College of Natural Sciences > Department of Physics > 1. Journal Articles
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