Refractometer probe based on a reflective carbon nanotube-modified microfiber Bragg grating


A carbon nanotube (CNT)-modified microfiber Bragg grating (MFBG) is proposed to measure the refractive index with a strong enhancement of the sensitivity in the low refractive index region. The introduction of the CNT layer influences the evanescent field of the MFBG and causes modification of the reflection spectrum. With the increase of the surrounding refractive index (SRI), we observe significant attenuation to the peak of the Bragg resonance, while its wavelength remains almost unchanged. Our detailed experimental results disclose that the CNT-MFBG demonstrates strong sensitivity in the low refractive index range of 1.333-1.435, with peak intensity up to -53.4 dBm/refractive index unit, which is 15-folds higher than that of the uncoated MFBG. Therefore, taking advantage of the CNT-induced evanescent field enhancement, the reflective MFBG probe presents strong sensing capability in biochemical fields.

Publication DOI:
Divisions: College of Engineering & Physical Sciences
College of Engineering & Physical Sciences > Aston Institute of Photonics Technology (AIPT)
Additional Information: © 2016 Optical Society of America. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modifications of the content of this paper are prohibited. Funding: NSFC (61505165, 61405161, 11404263); Natural Science Basic Research Plan in Shaanxi Province of China (2016JQ6032); Marie Skłodowska-Curie Individual Fellowships in EU Horizon 2020 (660648).
Uncontrolled Keywords: Atomic and Molecular Physics, and Optics
Publication ISSN: 2155-3165
Last Modified: 08 Jul 2024 07:26
Date Deposited: 05 Oct 2016 10:20
Full Text Link: https://www.osa ... i=ao-55-25-7037
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2016-09-01
Published Online Date: 2016-08-29
Accepted Date: 2016-08-07
Authors: Jiang, Biqiang
Xue, Meng
Zhao, Chenyang
Mao, Dong
Zhou, Kaiming (ORCID Profile 0000-0002-6011-1912)
Zhang, Lin (ORCID Profile 0000-0002-1691-5577)
Zhao, Jianlin



Version: Accepted Version

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