Tunable large resonant absorption in a midinfrared graphene Salisbury screen

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The optical absorption properties of periodically patterned graphene plasmonic resonators are studied experimentally as the graphene sheet is placed near a metallic reflector. By varying the size and carrier density of the graphene, the parameters for achieving a surface impedance closely matched to free-space (Z(0) = 377 Omega) are determined and shown to result in 24.5% total optical absorption in the graphene sheet. Theoretical analysis shows that complete absorption is achievable with higher doping or lower loss. This geometry, known as a Salisbury screen, provides an efficient means of light coupling to the highly confined graphene plasmonic modes for future optoelectronic applications
Publisher
AMER PHYSICAL SOC
Issue Date
2014-10
Language
English
Article Type
Article
Citation

PHYSICAL REVIEW B, v.90, no.16

ISSN
1098-0121
DOI
10.1103/PhysRevB.90.165409
URI
http://hdl.handle.net/10203/208974
Appears in Collection
EE-Journal Papers(저널논문)
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