Journal
APPLIED PHYSICS LETTERS
Volume 103, Issue 7, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4818660
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A deep subwavelength terahertz plasmonic waveguide based on graphene-metal hybrid structure is proposed. A broadband mode confinement down to 1/100 of the free-space wavelength lambda(0) with a loss of 0.6 dB/lambda(0) can be achieved when the intra-band electron relaxation time is 100 ps. We show that very narrow slits with an appropriate periodicity created in the metal layer can serve as a grating to efficiently excite the surface plasmon-polariton mode with a normally incident terahertz beam, which can be further exploited for investigation of both interesting physics and innovative applications. (C) 2013 AIP Publishing LLC.
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