A first-principles study of strain tuned optical properties in monolayer tellurium

Jinjin Wang, Yanrong Guo, Hong Shen, Yu Yo Chen, Rongjun Zhang, Yuxiang Zheng, Liangyao Chen, Songyou Wang, Yu Jia, Hong Yi Chen, Wan Sheng Su

Research output: Contribution to journalArticle

Abstract

First-principles calculations are employed to study the optical properties of monolayer Te tuned by biaxial strain. Our results demonstrate that monolayer Te has strong absorption in the visible and ultraviolet regions, and that a structural transition occurs between the α-phase and the β-phase under certain strain. In addition, there is significant optical anisotropy in α- and β-Te, while γ-Te shows isotropic characteristics due to their different structural properties. Furthermore, strain has a significant impact on the optical properties. With increasing strain, the real and imaginary parts of the dielectric function exhibit redshift. In addition, the absorption spectrum is more likely to be excited under compressive strain rather than tensile strain in α- and β-Te, while only slight differences are induced in γ-Te. These findings can not only enhance the understanding of two-dimensional tellurium, but also provide an effective way to tune the optical properties for potential application in optoelectronic devices.

Original languageEnglish
Pages (from-to)41703-41708
Number of pages6
JournalRSC Advances
Volume9
Issue number71
DOIs
Publication statusPublished - 2019 Jan 1
Externally publishedYes

    Fingerprint

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

Wang, J., Guo, Y., Shen, H., Chen, Y. Y., Zhang, R., Zheng, Y., Chen, L., Wang, S., Jia, Y., Chen, H. Y., & Su, W. S. (2019). A first-principles study of strain tuned optical properties in monolayer tellurium. RSC Advances, 9(71), 41703-41708. https://doi.org/10.1039/c9ra08515g