Research On Metal-Insulator-Metal Plasma Waveguide Fabry-Perot Cavity Wavelength Division Multiplexer

Surface Plasmon Polaritons(SPPs)metal/insulator/metal(MIM)waveguide structures have high-intensity local and conductive properties,so this structure has become a research hotspot in micro-nano-waveguide optics.The Fabry-Perot cavity is a structure that resonates the incident light by energy reflection in the double isolation layer.Therefore,combining the MIM waveguide with the Fabry-Perot cavity produces a series of special effects on the transmitted energy.In addition,the multiplexing technique is a technique of performing a split transmission process by a signal and finally implementing a merge transmission.This paper integrates MIM waveguide structure,Fabry-Perot cavity and multiplexing technology to solve the problem of energy transmission loss in current waveguide multiplexing structures.The main research work is as follows:1.A nano-disc structure embedded metal block is proposed,which has high-performance band-pass filtering characteristics,and the center wavelength and quality factor of the pass frequency can be adjusted by the parameters of the embedded metal.The effects of the Fabry-Perot cavity formed on the surface plasmon are analyzed from the excitation coupling theory of SPPs.From this phenomenon,the reason of the increase of the quality factor and the decrease of the half-wave width are discussed.2.According to the waveguide-coupled disk resonator structure proposed above,a high-performance multi-channel wavelength division multiplexer is proposed.By adjusting the number of resonant cavities,the wavelength division multiplexing frequency division number can be dynamically adjusted,and the dual channel and dual channel wavelength division multiplexing effects can be realized.The output wavelength corresponding to each channel can be dynamically adjusted by the parameters of the embedded metal block in the cavity.The structure has higher transmission efficiency in performance,less insertion loss,and no adjacent channel crosstalk,and has better demultiplexing frequency division characteristics.The results of this study provide a design idea for the future design of optical plasma demultiplexers.3.A multi-channel logic gate signal source based on a sawtooth resonator coupled metal waveguide structure is proposed.The structure is composed of a plurality of mutually perpendicular rectangular waveguides and a sawtooth resonator,and the multi-port filtering is realized by the plasma local characteristic of the sawtooth resonator and the coupling characteristics of the cavity,and the multi-channel logic gate signal output is realized by multiplexing.Finally,a multi-channel plasma logic gate output source is constructed.The transmission characteristics of SPPs in MIM metal waveguides are theoretically studied.From the phenomenon of microcavity resonance coupling in metal waveguides,the reason why the resonance cavity in metal waveguides can affect the actual transmission of SPPs is theoretically discussed.This study provides ideas for designing all-optical logic output sources in the future.4.Proposed a scheme for preparing plasma waveguides by electron beam etching,nanoimprinting,spin coating,etc.,aiming to provide a guiding plan for future experimental verification.