Journal
APPLIED PHYSICS EXPRESS
Volume 9, Issue 5, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.7567/APEX.9.055202
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Funding
- Ministry of Education, Culture, Sports, Science and Technology (MEXT, Japan)
- Japan Society for the Promotion of Science (JSPS) [26107522, 25400324, 24681031, 15H05408, 15K13337, 15K13500, 25246010, 25610074]
- Precursory Research for Embryonic Science and Technology (PRESTO) of the Japan Science and Technology Agency (JST)
- Grants-in-Aid for Scientific Research [25610074, 15H05408, 15K13500, 16H00911, 15K13337] Funding Source: KAKEN
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We demonstrate a simple modulation technique of nonlinear optical properties in monolayer (1L) MoS2 via chemical doping. The strong nonlinear behavior of the exciton photoluminescence (PL) intensity is observed with increasing excitation power density for low-electron-density 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F(4)TCNQ)-doped 1L-MoS2, whereas the exciton PL intensity of as-prepared, heavily electron-doped 1L-MoS2 exhibits weak sublinear behavior. These results are attributable to an enhanced exciton-exciton annihilation rate for the excitons in F(4)TCNQ-doped 1L-MoS2 as the dominant decay pathway under strong optical excitation conditions. (C) 2016 The Japan Society of Applied Physics.
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