A highly sensitive and fast response molecular sensor based on graphene coated microfiber

Baicheng Yao; Yu Wu; Yuan Gong; Yunjiang Rao

doi:10.1117/12.975251

7 November 2012 A highly sensitive and fast response molecular sensor based on graphene coated microfiber

Baicheng Yao, Yu Wu, Yuan Gong, Yunjiang Rao

Proceedings Volume 8421, OFS2012 22nd International Conference on Optical Fiber Sensors; 842186 (2012) https://doi.org/10.1117/12.975251
Event: OFS2012 22nd International Conference on Optical Fiber Sensor, 2012, Beijing, China

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.

Citation Download Citation

Baicheng Yao, Yu Wu, Yuan Gong, and Yunjiang Rao "A highly sensitive and fast response molecular sensor based on graphene coated microfiber", Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 842186 (7 November 2012); https://doi.org/10.1117/12.975251

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