A Photonic Functional Device Based On A Photonic Crystal Ring Cavity

Since the 1980 s,scientists have conducted extensive research on the movement of electrons in substances,especially in semiconductors,but in recent years,especially when Moore's Law has been broken in2010,Many scholars and semiconductor producers believe that the physical limits of silicon are about to arrive(reportedly about 5 nm).So in the current process conditions,the microelectronics industry has been unable to integrate higher-density transistors to maintain the existing pace of development.And this paper is base in this point,hoping to use two non-linear materials :doping graphene and polyethylene.Using their optical limiting properties,so that under the control of light to change its refractive index,so as to change the band structure of the entire device,in case to achieve a variety of device functions.This paper demonstrates and simulates a variety of devices,such as dividers,wavelength division multiplexers.And designed several logic gates.They have achieved the basic requirements of the device.Better completed the experimental purpose.First,we examed the basic properties of two typical non-linear materials,polyethylene and graphene.Where polyethylene is made of polyethylene as the object.While the graphene is based on multi-layer graphene-coated silica dielectric column.Mainly in order to derive both the dielectric constant and field strength of the joint relationship.Second,we built the ring resonator with the polyethylene as the main body.We use the air as the background,select the polyethylene and silicon material as a dielectric column,to build a ring cavity in oder to study the working characteristics of the annular cavity.Adjust the structure,so that the working efficiency of the ring cavity can reach about 80% of the conversion effect.On this basis,the use of circular cavity for wave division work.According to the working characteristics of the circular cavity,the single cavity logic or gate,the double cavity asymmetrical AND gate,and the double cavity symmetrical or gate and polyethylene /graphene-silica or gate are designed respectively.Can meet the logic of the door of the work requirements.At last,in this paper,we use the circular cavity excellent wave effect,on the basis of the demultiplexer,respectively,in the cavity to change the radius of the dielectric column method,the introduction of point defects.Then we realized the power divider,by changing the radius of the dielectric column,making the power splitter become adjustable power splitter.At the same time on this basis,we try to introduce different dielectric materials in the cavity,found that the resonant peak can be offset,when the shift effect is obvious when we introduced graphene doping materials to enhance the contrast work.So as to better realize the effect of wavelength division multiplexing.