Terahertz Quantum Plasmonics of Nanoslot Antennas in Nonlinear Regime
- Authors
- Kim, Joon-Yeon; Kang, Bong Joo; Park, Joohyun; Bahk, Young-Mi; Kim, Won Tae; Rhie, Jiyeah; Jeon, Hyeongtag; Rotermund, Fabian; Kim, Dai-Sik
- Issue Date
- Oct-2015
- Publisher
- AMER CHEMICAL SOC
- Keywords
- Terahertz nonlinearity; quantum plasmonics; terahertz nanoslot antenna; metal-insulator--metal tunneling; aluminum oxide
- Citation
- NANO LETTERS, v.15, no.10, pp.6683 - 6688
- Indexed
- SCIE
SCOPUS
- Journal Title
- NANO LETTERS
- Volume
- 15
- Number
- 10
- Start Page
- 6683
- End Page
- 6688
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/156228
- DOI
- 10.1021/acs.nanolett.5b02505
- ISSN
- 1530-6984
- Abstract
- 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.
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