Journal article
Nonlinear THz response of metallic armchair graphene nanoribbon superlattices
Journal of physics. D, Applied physics, Vol.49(46), p.46
10/21/2016
DOI: 10.1088/0022-3727/49/46/46LT01
Abstract
We study the third order THz nonlinear response of metallic armchair graphene nanoribbon superlattices in the presence of an elliptically-polarized excitation field using the time dependent perturbation theory. For a one-dimensional Kronig-Penney potential of infinite length, the nonlinear response can be described perturbatively by a low energy k⋅p N-photon coupling model. Remarkably, as shown by Burset et al the energy dispersion of the metallic band in the direction parallel to the superlattice wavevector is independent of the applied superlattice potential while the energy dispersion in the direction perpendicular to the superlattice wavevector depends strongly on the superlattice parameters. As a result, we predict novel behavior for the nonlinear response of single layer metallic acGNR superlattices to an applied elliptically-polarized electric field. Our work shows that the superlattice potential, periodicity, Fermi level, excitation field polarization state, and temperature all play a significant role in the resulting THz nonlinear conductances.
Details
- Title: Subtitle
- Nonlinear THz response of metallic armchair graphene nanoribbon superlattices
- Creators
- Yichao Wang - University of IowaDavid R Andersen - University of Iowa
- Resource Type
- Journal article
- Publication Details
- Journal of physics. D, Applied physics, Vol.49(46), p.46
- Publisher
- IOP Publishing
- DOI
- 10.1088/0022-3727/49/46/46LT01
- ISSN
- 0022-3727
- eISSN
- 1361-6463
- Number of pages
- 6
- Language
- English
- Date published
- 10/21/2016
- Academic Unit
- Physics and Astronomy; Electrical and Computer Engineering
- Record Identifier
- 9984197338802771
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