Razavipour, Hadi, Yang, Wayne, Guermoune, Abdeladim, Hilke, Michael, Cooke, David G., Al-Naib, Ibraheem, Dignam, Marc M., Blanchard, François, Hafez, Hassan A., Chai, Xin, Ferachou, Denis, Ozaki, Tsuneyuki, Lévesque, Pierre L. et Martel, Richard.
2015.
« High-field response of gated graphene at terahertz frequencies ».
Physical Review B, vol. 92, nº 24.
Compte des citations dans Scopus : 14.
![[img]](http://espace2.etsmtl.ca/12031/1.hassmallThumbnailVersion/Blanchard%20F.%202015%2012031%20Pre-print%20High-field%20response%20of%20gated%20graphene%20at%20terahertz%20frequencies.pdf)  Preview |
|
PDF
Blanchard F. 2015 12031 Pre-print High-field response of gated graphene at terahertz frequencies.pdf
- Submitted Version
Download (3MB)
| Preview
|
Abstract
We study the Fermi energy level dependence of nonlinear terahertz (THz) transmission of gated
multi-layer and single-layer graphene transferred onto sapphire and quartz substrates. The two
samples represent two limits of low-field impurity scattering: short-range neutral and long-range
charged impurity scattering, respectively. We observe an increase in the transmission as the field
amplitude is increased due to intraband absorption bleaching starting at fields above 8 kV/cm. This
e↵ect arises from a field-induced reduction in THz conductivity that depends strongly on the Fermi
energy. We account for intraband absorption using a free carrier Drude model that includes neutral
and charged impurity scattering as well as optical phonon scattering. We find that although the
Fermi-level dependence in the monolayer and five-layer samples is quite di↵erent, both exhibit a
strong dependence on the field amplitude that cannot be explained on the basis of an increase in
the lattice temperature alone. Our results provide a deeper understanding of transport in graphene
devices operating at THz frequencies and in modest kV/cm field strengths where nonlinearities
exist.
Item Type: |
Peer reviewed article published in a journal
|
Additional Information: |
Identifiant de l'article: 245421 |
Professor: |
|
Affiliation: |
Génie électrique |
Date Deposited: |
18 Dec 2015 14:56 |
Last Modified: |
20 Jan 2016 14:49 |
URI: |
https://espace2.etsmtl.ca/id/eprint/12031 |
Actions (login required)
 |
View Item |