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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},
}