Polarization response of planarized optical waveguides to determine the anisotropic complex refractive index of graphene oxide thin films

Soon Xin Gan; Wen Sin Chong; Choon Kong Lai; Wu Yi Chong; Stephen J. Madden; Duk Yong Choi; Richard M. De La Rue; Harith Ahmad

doi:10.1364/AO.435309

Polarization response of planarized optical waveguides to determine the anisotropic complex refractive index of graphene oxide thin films

Soon Xin Gan, Wen Sin Chong, Choon Kong Lai, Wu Yi Chong^*, Stephen J. Madden, Duk Yong Choi, Richard M. De La Rue, Harith Ahmad

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

The polarization response of graphene oxide (GO)-coated planarized optical waveguides is used to determine the complex refractive index of GO film. GO films with thicknesses between 0.10 and 0.71 µm were coated on planarized optical waveguides. GO-coated waveguides exhibit large polarization dependent losses—and the polarization response depends strongly on the GO coating thickness. The response was used, together with finite element analysis, to determine the complex refractive index of the GO film. The complex refractive indices of GO films for both TE- and TM-polarized light at a wavelength of 1550 nm were found to be 1.71 + 0.09i and 1.58 + 0.05i, respectively. The uncertainties of n_GO and k_GO for TE-polarized light are ±0.02 and ±0.03, respectively, whereas the uncertainties of n_GO and k_GO for TM-polarized light are ±0.05 and ±0.02, respectively.

Original language	English
Pages (from-to)	744-750
Number of pages	7
Journal	Applied Optics
Volume	61
Issue number	3
DOIs	https://doi.org/10.1364/AO.435309
Publication status	Published - 20 Jan 2022

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@article{7b89318b77e640ef8a218acfe946ba8d,

title = "Polarization response of planarized optical waveguides to determine the anisotropic complex refractive index of graphene oxide thin films",

abstract = "The polarization response of graphene oxide (GO)-coated planarized optical waveguides is used to determine the complex refractive index of GO film. GO films with thicknesses between 0.10 and 0.71 µm were coated on planarized optical waveguides. GO-coated waveguides exhibit large polarization dependent losses—and the polarization response depends strongly on the GO coating thickness. The response was used, together with finite element analysis, to determine the complex refractive index of the GO film. The complex refractive indices of GO films for both TE- and TM-polarized light at a wavelength of 1550 nm were found to be 1.71 + 0.09i and 1.58 + 0.05i, respectively. The uncertainties of nGO and kGO for TE-polarized light are ±0.02 and ±0.03, respectively, whereas the uncertainties of nGO and kGO for TM-polarized light are ±0.05 and ±0.02, respectively.",

author = "Gan, {Soon Xin} and Chong, {Wen Sin} and Lai, {Choon Kong} and Chong, {Wu Yi} and Madden, {Stephen J.} and Choi, {Duk Yong} and {De La Rue}, {Richard M.} and Harith Ahmad",

note = "Publisher Copyright: {\textcopyright} 2022 Optical Society of America",

year = "2022",

month = jan,

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doi = "10.1364/AO.435309",

language = "English",

volume = "61",

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journal = "Applied Optics",

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TY - JOUR

T1 - Polarization response of planarized optical waveguides to determine the anisotropic complex refractive index of graphene oxide thin films

AU - Gan, Soon Xin

AU - Chong, Wen Sin

AU - Lai, Choon Kong

AU - Chong, Wu Yi

AU - Madden, Stephen J.

AU - Choi, Duk Yong

AU - De La Rue, Richard M.

AU - Ahmad, Harith

PY - 2022/1/20

Y1 - 2022/1/20

N2 - The polarization response of graphene oxide (GO)-coated planarized optical waveguides is used to determine the complex refractive index of GO film. GO films with thicknesses between 0.10 and 0.71 µm were coated on planarized optical waveguides. GO-coated waveguides exhibit large polarization dependent losses—and the polarization response depends strongly on the GO coating thickness. The response was used, together with finite element analysis, to determine the complex refractive index of the GO film. The complex refractive indices of GO films for both TE- and TM-polarized light at a wavelength of 1550 nm were found to be 1.71 + 0.09i and 1.58 + 0.05i, respectively. The uncertainties of nGO and kGO for TE-polarized light are ±0.02 and ±0.03, respectively, whereas the uncertainties of nGO and kGO for TM-polarized light are ±0.05 and ±0.02, respectively.

AB - The polarization response of graphene oxide (GO)-coated planarized optical waveguides is used to determine the complex refractive index of GO film. GO films with thicknesses between 0.10 and 0.71 µm were coated on planarized optical waveguides. GO-coated waveguides exhibit large polarization dependent losses—and the polarization response depends strongly on the GO coating thickness. The response was used, together with finite element analysis, to determine the complex refractive index of the GO film. The complex refractive indices of GO films for both TE- and TM-polarized light at a wavelength of 1550 nm were found to be 1.71 + 0.09i and 1.58 + 0.05i, respectively. The uncertainties of nGO and kGO for TE-polarized light are ±0.02 and ±0.03, respectively, whereas the uncertainties of nGO and kGO for TM-polarized light are ±0.05 and ±0.02, respectively.

UR - http://www.scopus.com/inward/record.url?scp=85122912985&partnerID=8YFLogxK

U2 - 10.1364/AO.435309

DO - 10.1364/AO.435309

M3 - Article

SN - 1559-128X

VL - 61

SP - 744

EP - 750

JO - Applied Optics

JF - Applied Optics

IS - 3

ER -

Polarization response of planarized optical waveguides to determine the anisotropic complex refractive index of graphene oxide thin films

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