石墨烯—介質(zhì)復(fù)合結(jié)構(gòu)的研究與應(yīng)用
[Abstract]:Since the preparation of graphene (Graphene), its excellent performance has attracted wide attention all over the world. Numerous graphene-based and excellent nano-electrons, photon devices are emerging, showing the huge application potential of graphene. In this paper, the propagation characteristics of electromagnetic wave in graphene-dielectric composite structure are analyzed by means of generalized spectral domain exponential matrix technique, mainly transmission and reflection characteristics. On this basis, the possibility of applying graphene-dielectric composite structure to a variety of devices is explored. In this paper, parallel planar waveguide, switch and power distributor are simulated and analyzed respectively. The main work and innovations of this paper are summarized as follows: firstly, the energy band structure of graphene is briefly introduced, and the microcosmic principle of excellent performance of graphene is explained. Then two kinds of graphene conductivity models are introduced, I. E., light band graphene conductivity model and multilayer graphene conductivity model under external light excitation. Then the equivalent circuit model of graphene and the technique of generalized spectral domain exponential matrix are introduced to pave the way for the following theoretical calculation. Secondly, the applications of equivalent circuit model, transfer matrix method and generalized spectral domain exponential matrix technique are compared and analyzed in detail. Finally, the generalized spectral domain exponential matrix technique is selected as the calculation method in this paper. Then, the propagation characteristics of electromagnetic wave in the composite structure of graphene-axial helical (bi -) anisotropic medium and multilayer graphene-ferroelectric medium are analyzed, and the effect of graphene introduction on the composite structure is introduced. Finally, on the basis of the previous study, we apply the multilayer graphene-ferroelectric dielectric composite structure to the parallel planar waveguide, and analyze the phase and attenuation characteristics of the waveguide TM mode in detail. We also simulated and analyzed the plasma exciton switches and power splitters working in terahertz band based on graphene-dielectric composite structure. It is found that adjusting the chemical potential of graphene can effectively control the "on" and "off" states of the switch and select the power distribution branch port of the power distributor. The purpose of this paper is to provide some reference for the industrial design and implementation of nano-electronics and photonics devices through simulation analysis.
【學(xué)位授予單位】:浙江大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2015
【分類號(hào)】:O613.71;TB33
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