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Proceedings Paper

A highly sensitive and fast response molecular sensor based on graphene coated microfiber
Author(s): Baicheng Yao; Yu Wu; Yuan Gong; Yunjiang Rao
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Paper Abstract

Graphene's featureless optical absorption, ultrahigh carrier mobility and optical modulation capacity would enable a new breed of optical devices with novel photonics characteristics. The complex refractive index (CRI) of graphene can be modulated by its local boundary conditions when molecules are attaching on the surface of the graphene layer, leading to change in the CRI of graphene, which would induce altered properties of the evanescent wave propagating between the graphene film and optical waveguide. In this paper, a novel fiber-optic sensor concept that integrates the graphene film onto a microfiber is proposed to detect the molecular concentration based on TE intensity measurement. The theoretical investigation shows that such a sensor could offer a solution for realization of a variety of high sensitivity and fast response molecular sensing in biological, medical and chemical fields.

Paper Details

Date Published: 7 November 2012
PDF: 4 pages
Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 842186 (7 November 2012); doi: 10.1117/12.975251
Show Author Affiliations
Baicheng Yao, Univ. of Electronic Science and Technology of China (China)
Yu Wu, Univ. of Electronic Science and Technology of China (China)
Yuan Gong, Univ. of Electronic Science and Technology of China (China)
Yunjiang Rao, Univ. of Electronic Science and Technology of China (China)


Published in SPIE Proceedings Vol. 8421:
OFS2012 22nd International Conference on Optical Fiber Sensors
Yanbiao Liao; Wei Jin; David D. Sampson; Ryozo Yamauchi; Youngjoo Chung; Kentaro Nakamura; Yunjiang Rao, Editor(s)

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