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Alternative Title
Abstract
By applying quantum perturbation theory to two-dimensional excitons in monolayer transition metal dichalcogenides (TMDCs), we develop a theoretical model for two-photon absorption in the near infrared spectral region. By assuming the bandwidth of the final excitonic state to be 0.15 eV, the two-photon absorption coefficients are as high as 50 cm/MW and selenium-based, monolayer TMDCs exhibit greater 2PA coefficients than sulfur-based, monolayer TMDCs. Our model is also compared to the experimental data obtained by Z-scans or nonlinear transmission measurements. © 2018 Optical Society of America.
Keywords
Source Title
Optics Express
Publisher
OSA - The Optical Society
Series/Report No.
Collections
Rights
Attribution 4.0 International
Date
2018
DOI
10.1364/OE.26.016093
Type
Article