期刊
SCIENTIFIC REPORTS
卷 5, 期 -, 页码 -出版社
NATURE RESEARCH
DOI: 10.1038/srep09218
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资金
- Area of excellency [AoE/P-04/08]
- CRF of Hong Kong Research Grant Council [HKU9/CRF/13G]
- SRT on New Materials of The University of Hong Kong
The optical properties of monolayer transition metal dichalcogenides (TMDC) feature prominent excitonic natures. Here we report an experimental approach to measuring the exciton binding energy of monolayer WS2 with linear differential transmission spectroscopy and two-photon photoluminescence excitation spectroscopy (TP-PLE). TP-PLE measurements show the exciton binding energy of 0.71 +/- 0.01 eV around K valley in the Brillouin zone.
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