We theoretically study the optical absorption of a Fröhlich polaron in monolayer transition metal dichalcogenides (TMDS) on different polar substrates using the Devreese-Huybrechts-Lemmens model, in which both the surface optical phonon modes induced by the polar substrate and the intrinsic longitudinal optical phonon modes have been taken into account. We find that the optical absorption occurs only as the energy of incident photon exceeds the energy of optical phonon. The behaviors of absorption are determined by the interplays between the strength of electron-optical phonon coupling and the energy of optical phonon. The amplitude of absorption can be tuned directly by the internal distance between TMDS and polar substrates. These theoretical results provide significant insight into the infrared absorption in two-dimensional materials.
Skip Nav Destination
Article navigation
28 May 2018
Research Article|
May 30 2018
Optical absorption of Fröhlich polaron in monolayer transition metal dichalcogenides
Peng-Fei Li;
Peng-Fei Li
1
School of Microelectronics, Tianjin University
, Tianjin 300072, China
Search for other works by this author on:
Zi-Wu Wang
Zi-Wu Wang
a)
2
Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, Department of Physics, Tianjin University
, Tianjin 300354, China
Search for other works by this author on:
a)
Electronic mail: wangziwu@tju.edu.cn
J. Appl. Phys. 123, 204308 (2018)
Article history
Received:
March 24 2018
Accepted:
May 14 2018
Citation
Peng-Fei Li, Zi-Wu Wang; Optical absorption of Fröhlich polaron in monolayer transition metal dichalcogenides. J. Appl. Phys. 28 May 2018; 123 (20): 204308. https://doi.org/10.1063/1.5030678
Download citation file:
Sign in
Don't already have an account? Register
Sign In
You could not be signed in. Please check your credentials and make sure you have an active account and try again.
Sign in via your Institution
Sign in via your InstitutionPay-Per-View Access
$40.00
Citing articles via
Related Content
Magneto-polarons in monolayer transition-metal dichalcogenides
J. Appl. Phys. (June 2018)
Self-adjointness and domain of the Fröhlich Hamiltonian
J. Math. Phys. (February 2016)
Spectral properties of an optical polaron in a magnetic field
J. Math. Phys. (June 1988)
Exciton formation assisted by longitudinal optical phonons in monolayer transition metal dichalcogenides
J. Appl. Phys. (September 2016)
Polarons
AIP Conference Proceedings (August 2003)