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Graphene-based tunable plasmon induced transparency in gold strips

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Details

Original languageEnglish
Pages (from-to)1069-1074
Number of pages6
JournalOptical Materials Express
Volume8
Issue number4
DOIs
Publication statusPublished - 1 Apr 2018
Publication typeA1 Journal article-refereed

Abstract

Plasmon induced transparency (PIT) has been numerically investigated and experimentally realized by two parallel gold strips on graphene for the mid-infrared (MIR) range. The PIT response is realized by the weak hybridization of two bright modes of the gold strips. The response of the device is adjusted with the lengths of two strips and tuned electrically in real time by changing the Fermi level (Ef) of the graphene. Ef is changed to tune the resonance frequency of the transparency window. A top gating is used to achieve high tunability and a 263 nm shift is obtained by changing the gate voltage from -0.6 V to 2.4 V. The spectral contrast ratio of our devices is up to 82%. (C) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement.

Keywords

  • ELECTROMAGNETICALLY INDUCED TRANSPARENCY, SLOW LIGHT, METAMATERIAL, SPECTROSCOPY, RESONATORS, DYNAMICS, ANALOG

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Field of science, Statistics Finland

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