Please use this identifier to cite or link to this item:
https://doi.org/10.1002/jrs.4141
Title: | Observation of low-wavenumber out-of-plane optical phonon in few-layer graphene | Authors: | Shang, J. Cong, C. Zhang, J. Xiong, Q. Gurzadyan, G.G. Yu, T. |
Keywords: | coherent phonon few-layer graphene Raman scattering ultrafast spectroscopy |
Issue Date: | Jan-2013 | Citation: | Shang, J., Cong, C., Zhang, J., Xiong, Q., Gurzadyan, G.G., Yu, T. (2013-01). Observation of low-wavenumber out-of-plane optical phonon in few-layer graphene. Journal of Raman Spectroscopy 44 (1) : 70-74. ScholarBank@NUS Repository. https://doi.org/10.1002/jrs.4141 | Abstract: | Few-layer graphene grown by chemical vapor deposition has been studied by Raman and ultrafast laser spectroscopy. A low-wavenumber Raman peak of ~120 cm-1 and a phonon-induced oscillation in the kinetic curve of electron-phonon relaxation process have been observed, respectively. The Raman peak is assigned to the low-wavenumber out-of-plane optical mode in the few-layer graphene. The phonon band shows an asymmetric shape, a consequence of so-called Breit-Wigner-Fano resonance, resulting from the coupling between the low-wavenumber phonon and electron transitions. The obtained oscillation wavenumber from the kinetic curve is consistent with the detected low-wavenumber phonon by Raman scattering. The origin of this oscillation is attributed to the generation of coherent phonons and their interactions with photoinduced electrons. Copyright © 2012 John Wiley & Sons, Ltd. | Source Title: | Journal of Raman Spectroscopy | URI: | http://scholarbank.nus.edu.sg/handle/10635/97408 | ISSN: | 03770486 | DOI: | 10.1002/jrs.4141 |
Appears in Collections: | Staff Publications |
Show full item record
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.