Deep-ultraviolet Raman scattering studies of monolayer graphene thin films
(2015) In Carbon- Abstract
- We present joint experimental and theoretical investigations of the deep-ultraviolet Raman scattering spectra of monolayer graphene thin films. We found that upon a 266 nm laser excitation, while the G mode remains pronounced, the mode is not observed. The mode exhibits distinctive linewidth broadening towards the ultraviolet frequency region. The peak intensity ratio of the and G modes increases dramatically excited at 355, 532, and 785 nm wavelengths. All of the experimental findings are in good agreement with the theory calculated by the tight-binding method. We theoretically show that the integrated intensity of the mode is inversely proportional to the incident photon energy, whereas that of the G mode increases as the fourth... (More)
- We present joint experimental and theoretical investigations of the deep-ultraviolet Raman scattering spectra of monolayer graphene thin films. We found that upon a 266 nm laser excitation, while the G mode remains pronounced, the mode is not observed. The mode exhibits distinctive linewidth broadening towards the ultraviolet frequency region. The peak intensity ratio of the and G modes increases dramatically excited at 355, 532, and 785 nm wavelengths. All of the experimental findings are in good agreement with the theory calculated by the tight-binding method. We theoretically show that the integrated intensity of the mode is inversely proportional to the incident photon energy, whereas that of the G mode increases as the fourth power of the incident photon energy. These results extend our understanding of the double resonance Raman scattering process of graphene away from the Dirac cones and provide the foundation for future technologically important developments of graphene in the deep-ultraviolet frequency range. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/5b094c08-e7fa-4569-9fc9-4ddcbcd689cb
- author
- Siregar, Syahril LU
- publishing date
- 2015
- type
- Contribution to journal
- publication status
- published
- in
- Carbon
- publisher
- Elsevier
- external identifiers
-
- scopus:84922709737
- ISSN
- 0008-6223
- language
- English
- LU publication?
- no
- id
- 5b094c08-e7fa-4569-9fc9-4ddcbcd689cb
- date added to LUP
- 2019-05-08 13:46:44
- date last changed
- 2022-01-31 19:39:39
@article{5b094c08-e7fa-4569-9fc9-4ddcbcd689cb,
abstract = {{We present joint experimental and theoretical investigations of the deep-ultraviolet Raman scattering spectra of monolayer graphene thin films. We found that upon a 266 nm laser excitation, while the G mode remains pronounced, the mode is not observed. The mode exhibits distinctive linewidth broadening towards the ultraviolet frequency region. The peak intensity ratio of the and G modes increases dramatically excited at 355, 532, and 785 nm wavelengths. All of the experimental findings are in good agreement with the theory calculated by the tight-binding method. We theoretically show that the integrated intensity of the mode is inversely proportional to the incident photon energy, whereas that of the G mode increases as the fourth power of the incident photon energy. These results extend our understanding of the double resonance Raman scattering process of graphene away from the Dirac cones and provide the foundation for future technologically important developments of graphene in the deep-ultraviolet frequency range.}},
author = {{Siregar, Syahril}},
issn = {{0008-6223}},
language = {{eng}},
publisher = {{Elsevier}},
series = {{Carbon}},
title = {{Deep-ultraviolet Raman scattering studies of monolayer graphene thin films}},
year = {{2015}},
}