Second harmonic generation using an electrically controlled asymmetric plasmonic waveguide

In this study, it was shown that field enhancement in the nonlinear metal-insulator-metal (MIM) plasmonic waveguides can result in a large enhancement of the second harmonic generation (SHG) magnitude as compared with values reported in the literature. The proposed structure has two metals at the to...

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Bibliographic Details
Published inJournal of experimental nanoscience Vol. 12; no. 1; pp. 104 - 113
Main Authors Soltani, Mohamadreza, Nikoufard, Mahmoud
Format Journal Article
LanguageEnglish
Published Abingdon Taylor & Francis 01.01.2017
Taylor & Francis Ltd
Taylor & Francis Group
Subjects
asymmetric structure
Crystal structure
Direct current
Electric fields
Electric potential
Electrodes
Insulators
Metals
plasmonic waveguides
Plasmonics
Second harmonic generation
Voltage
Waveguides
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Summary:In this study, it was shown that field enhancement in the nonlinear metal-insulator-metal (MIM) plasmonic waveguides can result in a large enhancement of the second harmonic generation (SHG) magnitude as compared with values reported in the literature. The proposed structure has two metals at the top and two metals at the bottom of the crystal. In this structure, a voltage is applied on metals to produce a SHG electrically. Hence, the metals that define the cavity also serve as electrodes capable of generating high direct current electric fields across the nonlinear material. The frequency of a fundamental wave at 458 nm was doubled and modulated in intensity by applying a moderate external voltage to the electrodes, yielding a voltage-dependent nonlinear generation with a higher coupling efficiency. All the simulations here have been calculated by using the finite-element-based commercial COMSOL software.
ISSN:1745-8080
1745-8099
DOI:10.1080/17458080.2017.1279353