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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
; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review Letters
volume
106
issue
17
article number
176802
publisher
American Physical Society
external identifiers
  • wos:000290100300016
  • scopus:79960621574
  • pmid:21635056
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
2016-04-01 09:56:08
date last changed
2023-11-09 07:39:43
@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.}},
  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}},
  doi          = {{10.1103/PhysRevLett.106.176802}},
  volume       = {{106}},
  year         = {{2011}},
}