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Valley-Dependent Brewster Angles and Goos-Hanchen Effect in Strained Graphene

Wu, Zhenhua; Zhai, F.; Peeters, F. M.; Xu, Hongqi LU and Chang, Kai (2011) In Physical Review Letters 106(17).
Abstract
We demonstrate theoretically how local strains in graphene can be tailored to generate a valley-polarized current. By suitable engineering of local strain profiles, we find that electrons in opposite valleys (K or K') show different Brewster-like angles and Goos-Hanchen shifts, exhibiting a close analogy with light propagating behavior. In a strain-induced waveguide, electrons in K and K' valleys have different group velocities, which can be used to construct a valley filter in graphene without the need for any external fields.
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review Letters
volume
106
issue
17
publisher
American Physical Society
external identifiers
  • wos:000290100300016
  • scopus:79960621574
ISSN
1079-7114
DOI
10.1103/PhysRevLett.106.176802
language
English
LU publication?
yes
id
08250d26-697c-40bb-a59c-b66f9de50afb (old id 1987109)
date added to LUP
2011-06-29 09:30:56
date last changed
2017-10-29 03:02:30
@article{08250d26-697c-40bb-a59c-b66f9de50afb,
  abstract     = {We demonstrate theoretically how local strains in graphene can be tailored to generate a valley-polarized current. By suitable engineering of local strain profiles, we find that electrons in opposite valleys (K or K') show different Brewster-like angles and Goos-Hanchen shifts, exhibiting a close analogy with light propagating behavior. In a strain-induced waveguide, electrons in K and K' valleys have different group velocities, which can be used to construct a valley filter in graphene without the need for any external fields.},
  articleno    = {176802},
  author       = {Wu, Zhenhua and Zhai, F. and Peeters, F. M. and Xu, Hongqi and Chang, Kai},
  issn         = {1079-7114},
  language     = {eng},
  number       = {17},
  publisher    = {American Physical Society},
  series       = {Physical Review Letters},
  title        = {Valley-Dependent Brewster Angles and Goos-Hanchen Effect in Strained Graphene},
  url          = {http://dx.doi.org/10.1103/PhysRevLett.106.176802},
  volume       = {106},
  year         = {2011},
}