Title
Valley-dependent brewster angles and Goos-Hänchen effect in strained graphene Valley-dependent brewster angles and Goos-Hänchen effect in strained graphene
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
New York, N.Y. ,
Subject
Physics
Source (journal)
Physical review letters. - New York, N.Y.
Volume/pages
106(2011) :17 , p. 176802,1-176802,4
ISSN
0031-9007
ISI
000290100300016
Carrier
E-only publicatie
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
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-Hänchen 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.
Full text (open access)
https://repository.uantwerpen.be/docman/irua/f15ba3/9b71078b.pdf
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