Tunable large resonant absorption in a midinfrared graphene Salisbury screen
Abstract
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 = 377Ω) 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.
Additional Information
© 2014 American Physical Society. Received 24 March 2014; Published 8 October 2014. This work was supported by the Air Force Office of Scientific Research under Multidisciplinary University Research Initiative Awards No. FA9550-12-1-0488 (V.W.B.), FA9550-12-1-0024 (S.K. and L.K.K.), and the Department of Energy, Office of Science, under Grant No. DE-FG02-07ER46405 (M.C.S. and H.A.A.). M. S. Jang and M. Choi acknowledge support from the R&D Program of the Global Frontier Center for Multiscale Energy Systems funded by the National Research Foundation under the Ministry of Science, ITC & Future Planning, Korea (Grants No. 2011-0031561 and No. 2011-0031577). M. S. Jang acknowledges a postdoctoral fellowship from the POSCO T. J. Park Foundation. V. W. Brar gratefully acknowledges a postdoctoral fellowship from the Kavli Nanoscience Institute. M. C. Sherrott gratefully acknowledges graduate fellowship support from the Resnick Sustainability Institute at Caltech. S. Kim and M. S. Jang acknowledge support from a Samsung Fellowship.Attached Files
Published - PhysRevB.90.165409.pdf
Submitted - 1312.6463.pdf
Supplemental Material - Supple.pdf
Files
Additional details
- Alternative title
- Tunable Large Resonant Absorption in a Mid-IR Graphene Salisbury Screen
- Eprint ID
- 52379
- Resolver ID
- CaltechAUTHORS:20141204-101624900
- FA9550-12-1-0488
- Air Force Office of Scientific Research (AFOSR)
- FA9550-12-1-0024
- Air Force Office of Scientific Research (AFOSR)
- DE-FG02-07ER46405
- Department of Energy (DOE)
- 2011-0031561
- National Research Foundation of Korea
- 2011-0031577
- National Research Foundation of Korea
- POSCO TJ Park Foundation
- Kavli Nanoscience Institute
- Resnick Sustainability Institute
- Samsung
- Ministry of Science, ICT and Future Planning (Korea)
- Created
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2014-12-04Created from EPrint's datestamp field
- Updated
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2021-11-10Created from EPrint's last_modified field
- Caltech groups
- Kavli Nanoscience Institute, Resnick Sustainability Institute