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 in:Plasmonics (Norwell, Mass.) Mass.), 2017-12, Vol.12 (6), p.1725-1731
Main Authors: Wang, Xiaosai, Wang, Jicheng, Hu, Zheng-Da, Song, Ci, Xia, Xiushan
Format: Article
Language:English
Subjects:
Biochemistry
Biological and Medical Physics
Biophysics
Biotechnology
Chemistry
Chemistry and Materials Science
Graphene
Nanotechnology
Silicon dioxide
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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