Terahertz Quantum Plasmonics of Nanoslot Antennas in Nonlinear Regime

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• 作者：Joon-Yeon Kim ; Bong Joo Kang ; Joohyun Park ; Young-Mi Bahk ; Won Tae Kim ; Jiyeah Rhie ; Hyeongtag Jeon ; Fabian Rotermund ; Dai-Sik Kim
• 刊名：Nano Letters
• 出版年：2015
• 出版时间：October 14, 2015
• 年：2015
• 卷：15
• 期：10
• 页码：6683-6688
• 全文大小：401K
• ISSN：1530-6992

文摘

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