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Terahertz Quantum Plasmonics at Angstrom Scale

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Abstract

We observed a ninety-seven percent decrease of terahertz transmittance in five-millimeter long, angstrom-sized metallic gaps of copper-graphene-copper hybrid structure. The giant nonlinearity originates from terahertz funneling-induced electron tunneling across the angstrom gap.

© 2016 Optical Society of America

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