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Study On The Design Of Boundary Coupled Rectangular Ring Cavity MIM Structural Filter And Electro-Optic Switch Based On The SPPs

Posted on:2022-06-09Degree:MasterType:Thesis
Country:ChinaCandidate:M Y ZhaiFull Text:PDF
GTID:2518306725453734Subject:Information and Communication Engineering
Abstract/Summary:PDF Full Text Request
The twenty-first Century is the age of the rapid development of information technology.The traditional devices,which use electronic devices as information carrier,are also developing toward higher speed,lower delay,less energy consumption and smaller size.However,the storage,transmission and transmission cost of large amounts of data are more and more strict with traditional devices on the size and performance.Surface plasmons polaritons(SPPs)can break through the limits of traditional optical diffraction and realize the integration of sub wavelength optical devices,which brings new hope to solve this problem.At present,SPPs has been widely used in many aspects,such as filters,optical switches,Bragg reflectors,sensors and so on.Starting from the research background of surface plasmons polaritons,this paper introduces the development,research status and related theories of surface plasmons polaritons.On this basis,two filters and an electro-optic switch based on surface plasmons polaritons are proposed.Firstly,an oblique symmetric double rectangular ring MIM filter is constructed by boundary coupling method.The filter consists of two oblique symmetric rectangular ring resonant cavities and a waveguide.The finite element method(FEM)was used to simulate and analyze the filter,and the magnetic field distribution and transmission spectrum were obtained.The results show the maximum transmittance of the filter in the pass-band is 0.969,and the minimum transmittance in the stop-band is close to 0,there are also the characteristics of wide pass-band and stop-band and smooth transmission spectrum in this filter.The transition from pass-band to stop-band is relatively smooth,the filter can realize a similar function of the Butterworth filter.By adjusting the structural parameters,the transmission spectrum of the filter can be red shifted or blue shifted and by setting certain structural parameters can realize the function of the on-off of the second and third communication windows of the filter can be controlled selectively while keeping the first communication window passing through.Then,we can achieve a Electro-optic Switch function by improving the structure and adding the Electro-optic material DAST and achieve the selective control function of the on-off of the second and third communication windows by setting certain voltage.Finally,a three rectangular ring MIM filter is further proposed on this basis.Compared with the double rectangular ring structural filter,this filter has greater steepness of rising edge and falling edge,which realizes a similar function of the rectangular filter,Both filters can be used as a band-pass /band-stop filter.The three structures proposed in this paper have a great significant application in high-density integrated circuits and optical fiber communication.
Keywords/Search Tags:Surface plasmon polaritons, Boundary coupling method, The finite element method, Rectangular ring resonant cavities, Electro-optic Switch, Band-pass/ band-stop filter
PDF Full Text Request
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