Journal Article

FZJ-2018-05823

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Contactless exploration of graphene properties using millimeter wave response of WGM resonator

Barannik, A. A.FZJ* ; Cherpak, N. T. ; Protsenko, I. A. ; Gubin, A. I.FZJ* ; Kireev, D.FZJ* ; Vitusevich, S. (Corresponding author)FZJ*

2018
AIP74335 New York, NY

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Please use a persistent id in citations: http://hdl.handle.net/2128/20358  doi:10.1063/1.5041335

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.

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Contributing Institute(s):

1. Bioelektronik (ICS-8)

Research Program(s):

1. 523 - Controlling Configuration-Based Phenomena (POF3-523) (POF3-523)

Appears in the scientific report 2018

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Database coverage:
; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; IF < 5 ; IF >= 10 ; JCR ; National-Konsortium ; Nationallizenz ; PubMed Central ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Web of Science Core Collection

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