Self-consistent dielectric constant determination for monolayer WSe2 | Zendy

SeongYeon Lee | Zendy; TaeYoung Jeong | Zendy; JiHee Kim | Zendy; Seokjoon Yun | Zendy; KiJu Yee | Zendy

AI Assistant Blog Pricing

Home ZAIA Blog

Open Access

Self-consistent dielectric constant determination for monolayer WSe₂

Author(s) -

SeongYeon Lee,

TaeYoung Jeong,

JiHee Kim,

Seokjoon Yun,

KiJu Yee

Publication year - 2018

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.26.023061

Subject(s) - exciton , monolayer , dielectric , trion , materials science , spectral line , dispersion (optics) , condensed matter physics , transmittance , coupling constant , optics , dispersion relation , kramers–kronig relations , molecular physics , atomic physics , refractive index , physics , optoelectronics , nanotechnology , astronomy , particle physics

Frequency-dependent dielectric constant dispersion of monolayer WSe 2 , ε(ω)=ε 1 (ω)+i ε 2 (ω), was obtained from simultaneously measured transmittance and reflectance spectra. Optical transitions of the trion as well as A-, B-, and C-excitons are clearly resolved in the ε 2 spectrum. A consistent Kramers-Kronig transformation between the ε 1 and ε 2 spectra support the validity of the applied analysis. It is found that the A- and B-exciton splitting in the case of the double-layer WSe 2 can be attributed to the spin-orbit coupling, which is larger than that in the monolayer WSe 2 . In addition, the temperature-induced evolution of the A-exciton energy and its width are explained by model equations with electron-phonon interactions.

The content you want is available to Zendy users.

Already have an account? Click here to sign in.

Having issues? You can contact us here

Accelerating Research