Journal
APPLIED PHYSICS EXPRESS
Volume 7, Issue 2, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.7567/APEX.7.024301
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Funding
- National Natural Science Foundation of China [11074069, 61176116, 11264021]
- Specialized Research Fund for the Doctoral Program of Higher Education of China [20120161130003]
- Aid program for Science and Technology Innovative Research Team in Higher Educational Institutions of Hunan Province
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A planar plasmonic filter consisting of two graphene ribbons coupled by a graphene ring is constructed on monolayer graphene and investigated using the finite-difference time-domain method. The simulation results reveal that the edge modes indeed enhance the electromagnetic coupling between objects. The structure exhibits perfect band-pass filtering effect tuning and is optimized by means of the gate voltage. The simulation results are confirmed by the resonance theory of the ring. This structure is a real electrically controlled filter operating in the mid-infrared region. Our studies support the fabrication of ultracompact planar devices for optical processing. (C) 2014 The Japan Society of Applied Physics
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