Terahertz Quantum Plasmonics of Nanoslot Antennas in Nonlinear Regime

摘要: Quantum tunneling in plasmonic nanostructures has presented an interesting aspect of incorporating quantum mechanics into classical optics. However, the study been limited to subnanometer gap regime. Here, we newly extend plasmonics widths well over 1 nm by taking advantage low-frequency terahertz Enhanced electric fields up 5 V/nm induce electrons different arrays ring-shaped nanoslot antennas from 1.5 10 nm, which lead a significant nonlinear transmission decrease. These observations are consistent with theoretical calculations considering terahertz-funneling-induced electron across gap.