Study On Optical Transport Effect Of Artificial Microstructure Containing Highly Dispersive Materials

Whether it is space,or the atmosphere,the ocean,the transmission of light in nature has always been a general concern of the physical phenomenon.In the microscopic category,the optical transmission characteristics of the artificial microstructure of photon are another basic research problem in the field of photophysics,and also attract people’s long interest in research.In recent years,from optical microcavities to heterogeneous structures,from gratings to optical waveguides,from photonic crystals to metamaterials,attention has been focused on a variety of artificial microstructures with special light transmission properties,To achieve a number of common structure does not have the new features.Among them,the photonic crystal as a kind of different refractive index material composed of periodic artificial microstructure in the concept was put forward after the widespread concern.Since the lattice constant of the photonic crystal is comparable to the wavelength,the Bragg scattering mechanism plays a very important role,and the formed photonic bandgap is also called the Bragg band gap.In view of the practical application,it is often necessary to regulate the optical transmission characteristics of the artificial microstructure by changing the material composition,for example,using a metal / dielectric composite structure.And highly dispersive materials,artificial microstructures containing highly dispersive materials are found to achieve significant field enhancement and light due to their varying degrees of dispersion from normal materials and the ability to switch between normal and anomalous dispersions Omnidirectional field and so on,so it is of great significance to study the optical transmission characteristics of artificial microstructure with highly dispersive materials.In this paper,the transmission matrix method and the scattering method are used to study the optical transmission properties of artificial microstructure with highly dispersive materials.In the second chapter of the paper,we have carried on the basic description to the artificial microstructure research method.The third chapter of the paper mainly studies the anomalous pattern splitting in the one-dimensional photonic crystal microcavity composed of the highly dispersed medium and the dielectric of the normal material.Since the propagation phase of the two dielectrics decreases with the decrease of theincident angle,the normal splitting mode in the traditional all-dielectric photonic crystal is always blue-shifted.Based on the phase change compensation between the anomalous dispersion material and the dielectric,the splitting mode of the dispersion can be canceled,so that the anomalous pattern splitting can be achieved.The results show that the anomalous splitting mode will be used in tunable high quality factor filter,angle independent sensor,nonlinear optical device and so on.In the fourth chapter,the optical properties of one-dimensional Fibonacci periodic periodic photonic crystals with anomalous dispersive materials are studied.We simulate the real and imaginary parts of the dielectric constant in the anomalous dispersion material doped with different quantum dot concentrations according to a series of equations.It was found that the degree of dispersion was violent with the increase of the doping concentration of quantum dots.And its transmission spectra were studied.It was found that some new sharp bands were derived from the original band edge compared with the photonic crystal of the one-dimensional Fibonacci periodic phase of the normal material.In addition,as the ordinal number increases,the original band near the edge of the new band also increased.When the incident angle increases from 0 ° to 30 °,the transmission spectrum of the one-dimensional Fibonacci periodic quasiconic photonic crystal containing the anomalous dispersion material is blue-shifted.One-dimensional Fibonacci periodic photonic crystals composed of anomalous dispersion materials have a very wide range of applications,such as fabrication of microresons,semiconductor lasers,ultra-narrowband filters,and so on.