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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 24 — Dec. 2, 2013
  • pp: 29818–29826

Demonstration of complex refractive index of graphene waveguide by microfiber-based Mach–Zehnder interferometer

Baicheng Yao, Yu Wu, Zegao Wang, Yang Cheng, Yunjiang Rao, Yuan Gong, Yuanfu Chen, and Yanrong Li  »View Author Affiliations

Optics Express, Vol. 21, Issue 24, pp. 29818-29826 (2013)

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The complex refractive index (CRI) of graphene waveguide (GW) is of great importance for modeling and developing graphene-based photonic or optoelectronic devices. In this paper, the CRI of the GW is investigated theoretically and experimentally, it is found that the CRI of the GW will modulate the intensity and phase of transmitting light. The phase alterations are obtained spectrally by a Microfiber-based Mach–Zehnder interferometer (MMZI), experimental results demonstrate that the CRIs of the GW vary from 2.91-i13.92 to 3.81-i14.64 for transmitting wavelengths ranging from 1510 to 1590 nm. This method cannot only be used to determine the CRI of the GW optically and provide one of the fundamental parameters for designing graphene-based optic devices for communication and sensing applications, but also is adoptable in graphene-based transformation optics for determination of the CRI of the GW at other wavelengths.

© 2013 Optical Society of America

OCIS Codes
(060.5060) Fiber optics and optical communications : Phase modulation
(160.4670) Materials : Optical materials
(310.2790) Thin films : Guided waves

ToC Category:

Original Manuscript: October 10, 2013
Revised Manuscript: November 14, 2013
Manuscript Accepted: November 15, 2013
Published: November 25, 2013

Baicheng Yao, Yu Wu, Zegao Wang, Yang Cheng, Yunjiang Rao, Yuan Gong, Yuanfu Chen, and Yanrong Li, "Demonstration of complex refractive index of graphene waveguide by microfiber-based Mach–Zehnder interferometer," Opt. Express 21, 29818-29826 (2013)

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