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@ARTICLE{Barannik:856418,
author = {Barannik, A. A. and Cherpak, N. T. and Protsenko, I. A. and
Gubin, A. I. and Kireev, D. and Vitusevich, Svetlana},
title = {{C}ontactless exploration of graphene properties using
millimeter wave response of {WGM} resonator},
journal = {Applied physics reviews},
volume = {113},
number = {9},
issn = {1077-3118},
address = {New York, NY},
publisher = {AIP74335},
reportid = {FZJ-2018-05823},
pages = {094102 -1-4},
year = {2018},
abstract = {The response of a sapphire whispering gallery mode (WGM)
resonator to a single-layer graphene film was studied in the
millimeter wave band (frequency of about 40 GHz) at
different distances of graphene from the resonator. In the
resonator, the HE141δ WGM was excited, in which the
longitudinal component of the electric field is predominant.
Based on the fitting results of both the response
measurement and the numerical simulation of the resonator,
the conductivity value was obtained for a known film
thickness. The conductivity of our CVD-grown and transferred
graphene was found to be (1.02 ± 0.06) × 106 S/m.
This deviates slightly from the values obtained through our
DC conductivity measurements, reflecting the real parameters
of the graphene material after transfer from copper to a
quartz substrate. A significant difference was demonstrated
between the conductivity values obtained by the fitting
procedure and those calculated using the perturbation
method. In explanation for the discrepancy, we propose a
possible inapplicability of the perturbation method for the
cases of both the resonator and mode polarization used in
this work. The results of this work show that a WGM
resonator technique allows contactless exploration of
graphene parameters, such as conductivity or sheet
resistance, in the millimeter wave band.},
cin = {ICS-8},
ddc = {530},
cid = {I:(DE-Juel1)ICS-8-20110106},
pnm = {523 - Controlling Configuration-Based Phenomena (POF3-523)},
pid = {G:(DE-HGF)POF3-523},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000443759600030},
doi = {10.1063/1.5041335},
url = {https://juser.fz-juelich.de/record/856418},
}