Modulating Plasmonic Sensor with Graphene-Based Silicon Grating

We propose a modulating plasmonic structure device which is composed of a single layer graphene above the silicon Bragg grating with the silica spacer layer. This graphene-based plasmonic modulation provides a broad stop-band with high tunability in the mid-infrared region of the transmission spectr...

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Bibliographic Details
Published inPlasmonics (Norwell, Mass.) Vol. 12; no. 6; pp. 1725 - 1731
Main Authors Wang, Xiaosai, Wang, Jicheng, Hu, Zheng-Da, Song, Ci, Xia, Xiushan
Format Journal Article
LanguageEnglish
Published New York Springer US 01.12.2017
Springer Nature B.V
Subjects
Biochemistry
Biological and Medical Physics
Biophysics
Biotechnology
Chemistry
Chemistry and Materials Science
Graphene
Nanotechnology
Silicon dioxide
Bragg grating
Plasmonic sensor
Mid-infrared region
Graphene plasmonics
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Summary:We propose a modulating plasmonic structure device which is composed of a single layer graphene above the silicon Bragg grating with the silica spacer layer. This graphene-based plasmonic modulation provides a broad stop-band with high tunability in the mid-infrared region of the transmission spectra achieved by altering the geometrical parameters of the silicon grating and the gate voltage. By engineering, a phase discontinuity into the graphene-based Bragg grating, we can selectively open a transmission window in the previous stop-band spectra. These proposed graphene-based structures are easy to fabricate and operate, which have potential applications as ultra-compact high-sensitivity sensors.
ISSN:1557-1955
1557-1963
DOI:10.1007/s11468-016-0439-3