Graphene enhanced evanescent field in microfiber multimode interferometer for highly sensitive gas sensing

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

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Author(s)

  • B. C. Yao
  • Y. Wu
  • A. Q. Zhang
  • Y. J. Rao
  • Z. G. Wang
  • Y. Cheng
  • Y. Gong
  • W. L. Zhang
  • Y. F. Chen

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)28154-28162
Journal / PublicationOptics Express
Volume22
Issue number23
Online published5 Nov 2014
Publication statusPublished - 17 Nov 2014

Abstract

Graphene based new physics phenomena are leading to a variety of stimulating graphene-based photonic devices. In this study, the enhancement of surface evanescent field by graphene cylindrical cladding is observed, for the first time, by using a graphene-coated microfiber multimode interferometer (GMMI). It is found theoretically and experimentally that the light transmitting in the fiber core is efficiently dragged by the graphene, hence significantly enhancing the evanescent fields, and subsequently improving the sensitivity of the hybrid waveguide. The experimental results for gas sensing verified the theoretical prediction, and ultra-high sensitivities of ∼0.1 for NH3 gas detection and ∼0.2 for H2O vapor detection are achieved, which could be used for trace analysis. The enhancement of surface evanescent field induced by graphene may pave a new way for developing novel graphene-based all-fiber devices with compactness, low cost, and temperature immunity.

Citation Format(s)

Graphene enhanced evanescent field in microfiber multimode interferometer for highly sensitive gas sensing. / Yao, B. C.; Wu, Y.; Zhang, A. Q.; Rao, Y. J.; Wang, Z. G.; Cheng, Y.; Gong, Y.; Zhang, W. L.; Chen, Y. F.; Chiang, K. S.

In: Optics Express, Vol. 22, No. 23, 17.11.2014, p. 28154-28162.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal