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Local laser heating effects in monolayer WS2 probed by photoluminescence

Publication ,  Journal Article
Peng, Q; Zheng, CC; Chen, X; Wang, RX; Xu, SJ; Ge, XT; Ding, D; Gong, ZM; Ning, JQ; Zhang, RY
Published in: Applied Surface Science
October 1, 2021

In this article, we report the local heating effects induced by laser irradiation in mechanically exfoliated WS2 monolayers and the characterization of the resulting inhomogeneous temperature field with the technique of photoluminescence spectroscopy. By comparatively measuring the PL spectra of the monolayer WS2 in different contact conditions as well as in air and vacuum, we confirm the existence of remarkable heating in the monolayer due to laser irradiation. In particular, it is found that a specific excitonic emission peak could be used to characterize the inhomogeneous Gaussian-like thermal field and the heat transfer behaviors. Based on the dependence of the excitonic emission energy on temperature, the local temperature induced by laser irradiation may be obtained, i.e., a local temperature up to 213 °C was found at the central region of the irradiated area in vacuum for the excitation power of 450 μW. Such optical method may be applied to the measurement of local heating effects in 2D semiconductors and relevant van der Waals devices.

Duke Scholars

Published In

Applied Surface Science

DOI

ISSN

0169-4332

Publication Date

October 1, 2021

Volume

562

Related Subject Headings

  • Applied Physics
 

Citation

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Peng, Q., Zheng, C. C., Chen, X., Wang, R. X., Xu, S. J., Ge, X. T., … Zhang, R. Y. (2021). Local laser heating effects in monolayer WS2 probed by photoluminescence. Applied Surface Science, 562. https://doi.org/10.1016/j.apsusc.2021.150226
Peng, Q., C. C. Zheng, X. Chen, R. X. Wang, S. J. Xu, X. T. Ge, D. Ding, Z. M. Gong, J. Q. Ning, and R. Y. Zhang. “Local laser heating effects in monolayer WS2 probed by photoluminescence.” Applied Surface Science 562 (October 1, 2021). https://doi.org/10.1016/j.apsusc.2021.150226.
Peng Q, Zheng CC, Chen X, Wang RX, Xu SJ, Ge XT, et al. Local laser heating effects in monolayer WS2 probed by photoluminescence. Applied Surface Science. 2021 Oct 1;562.
Peng, Q., et al. “Local laser heating effects in monolayer WS2 probed by photoluminescence.” Applied Surface Science, vol. 562, Oct. 2021. Scopus, doi:10.1016/j.apsusc.2021.150226.
Peng Q, Zheng CC, Chen X, Wang RX, Xu SJ, Ge XT, Ding D, Gong ZM, Ning JQ, Zhang RY. Local laser heating effects in monolayer WS2 probed by photoluminescence. Applied Surface Science. 2021 Oct 1;562.
Journal cover image

Published In

Applied Surface Science

DOI

ISSN

0169-4332

Publication Date

October 1, 2021

Volume

562

Related Subject Headings

  • Applied Physics