A. Cruz, Wêndria Cunha, T. Rosso, V. Dmitriev, K. Costa
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Spectral Analysis of a SPR Sensor based on Multilayer Graphene in the Far Infrared Range
− In this paper, we present a spectral analysis of a Surface Plasmon Resonance (SPR) sensor based on multilayer graphene (MLG) operating as a terahertz refractometer. This device’s structure is based on Kretschmann configuration, and the graphene layers are modeled as surface impedances with conductivity described by the Kubo model. The structure’s electromagnetic response is obtained from the Generalized Coefficients Model, considering TM excitation performed in a frequency range from 1 to 4Thz. In this approach, we evaluate the sensor response for two, three, four and five layers of graphene, equally doped. To verify the effects of MLG doping, we varied the chemical potential by 0.35eV and 0.70eV. As a result, we present the plasmonic response of the device, verifying the operating frequency range for each case of multilayer graphene. In addition, the sensitivity, FWHM and Figure of Merit (FOM) are calculated to describe the sensor performance in each demonstrated case. From the results presented, we verified that the increase in doping reduces the sensitivity of the sensor, however, it improves its FOM. The validation of the proposed model was carried out from simulations in a software based on the Finite Element Method.
期刊介绍:
The Journal of Microwaves, Optoelectronics and Electromagnetic Applications (JMOe), published by the Brazilian Microwave and Optoelectronics Society (SBMO) and Brazilian Society of Electromagnetism (SBMag), is a professional, refereed publication devoted to disseminating technical information in the areas of Microwaves, Optoelectronics, Photonics, and Electromagnetic Applications. Authors are invited to submit original work in one or more of the following topics. Electromagnetic Field Analysis[...] Computer Aided Design [...] Microwave Technologies [...] Photonic Technologies [...] Packaging, Integration and Test [...] Millimeter Wave Technologies [...] Electromagnetic Applications[...] Other Topics [...] Antennas [...] Articles in all aspects of microwave, optoelectronics, photonic devices and applications will be covered in the journal. All submitted papers will be peer-reviewed under supervision of the editors and the editorial board.