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Study On Characteristics Of MIM Coupling Cavity Electrically Tunable SPPs Filters Based On DAST

Posted on:2021-01-30Degree:MasterType:Thesis
Country:ChinaCandidate:Z H GuoFull Text:PDF
GTID:2428330611951998Subject:Information and Communication Engineering
Abstract/Summary:PDF Full Text Request
With the advent of the information age,communication technology has developed vigorously,the integration and miniaturization of devices has become an inevitable trend,the problems of small storage,slow transmission,and poor anti-interference performance of traditional electronic devices have become more obvious.Opto-electronic devices have become the focus of technological development because of their high-concurrency,high-speed,and high-capacity data processing characteristics,and have been widely studied.Surface plasmon polaritons?SPPs?are electromagnetic waves that can be used as a carrier of information and energy,and have the characteristics of breaking through the limits of traditional optical diffraction,providing the possibility for making integrated photonic devices.Therefore,the surface plasmon polaritons technology has been rapidly developed,has been widely used in sensors,electro-optic switches and splitters,and has continuously promoted the development of science and technology.In this paper,electro-optic materials and filters are combined.A metal-insulator-metal?MIM?nano-cavity waveguide electrically tunable filter is designed based on the surface plasmon polaritons using boundary coupling method.The structure of the filter is composed of two asymmetrical H-type resonators and a rectangular waveguide,and the H-type resonator is filled with the organic electro-optic material DAST.The finite element method?FEM?is used to numerically simulate the transmission characteristic curve,resonance wavelength and magnetic field distribution of the asymmetric H-type resonators filter.The research results show that this filter has the characteristics of smooth transmission curve,wide bandwidth?full width at half maximum to 754 nm?,and the passband transmittance is as high as 0.968,the stopband transmittance is as low as 1×10-5,the structure can be used as a band stop filter.At the same time,the filter can not only adjust its transmission characteristics by changing the structural parameters,but also adjust its transmission characteristics by applying a control voltage,so the tunability of the filter is increased.Then,the Y-type resonators filter was optimized and designed based on the H-type resonators,which overcomes the problem of unstable resonance mode of the H-type resonators filter when the structure is changed.And by adjusting the voltage and structural parameters,the on/off selection of three communication windows?850 nm,1310 nm,1550 nm?in the optical communication band is realized.Finally,the aperture coupling method is used to design an asymmetric micro-ring resonators filter.The bandwidth of the stopband and the passband are both wide,which can be used as a bandpass/bandstop filter.Therefore,the filter proposed in this paper has certain application prospects in high-density integrated circuits and nano-optics.
Keywords/Search Tags:Surface plasmon polaritons, MIM resonator waveguide, Filter, Electro-optical material DAST, Side-coupled, Aperture-coupled
PDF Full Text Request
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