The Research On Interaction Of Photonic Metamaterical And Monolayer Graphene

In recent years, metamaterial has attracted wide attention as an emerging field. Metamaterial belongs to the category of material, of which the raw material comes from nature. After artificial process, its size of structure units is far smaller than the incident wavelength, which makes it distinguished by extraordinary physical properties from natural material. The interests of metamaterial contain imaging, stealth, sensors and waveguide applications, and widely used in fields of optical engineering and materials science. We have studied the interaction between the optical metamaterials and graphene, and it is also the use of the unique local effect of optical by the optical metamaterials, so generate the regulatory effect interaction between graphene and the metamaterial.In this paper, we design a multilayer hyperbolic metamaterials, using the hyperbolic metamaterials specific characteristics of dielectric constant anisotropy, and local the light effective, then control of the Raman of graphene, finally achieve the Raman of graphene effective enhancement. This metamaterial is simple in preparation, and the enhancement effect is obvious. In the course of the study, for the hyperbolic metamaterials regulate Raman signal, using the electromagnetic simulation software COMSOL design metal- dielectric periodic multilayer structure, simulation of the upper dielectric layer, that is the different of thickness of the wetting layer graphene Raman intensity. Multilayer film structure was prepared by electron beam evaporation, and the refractive index was measured by spectroscopic ellipsometry. The dielectric constant of horizontal and vertical direction was fitted by the equivalent medium theory. By the anisotropy of dielectric constant to determine whether the structure of the prepared structure has the characteristics of hyperbolic metamaterials at the wavelength of the 514 nm in the Raman spectrometer, so as to determine whether the structure of the prepared material is a hyperbolic metamaterial. At the end of the paper, a simple method is used to transfer the monolayer graphene, and the Raman spectra of graphene are measured by the Raman spectroscopy. The results of the experiments are compared with the simulation results.At the same time, this paper also design, perovskite FP micro cavity laser performance is improved by using graphene. Through the experiment results can be obtained the graphene can effectively reduce the threshold of the micro lead halide perovskite laser, and increase the output intensity of the laser. For graphene to improve the performance of perovskite optical micro cavity, the study process, through the wet transfer, will cut the size of the appropriate monolayer graphene transferred to a clean glass. Use the method of chemical synthesis to prepare the lead halide perovskite micron rod structure. Using femtosecond lasers emit the wavelength is 400 nm laser vertical incident and pump to a single perovskite micron rod structure, use the Glan laser prism to change the intensity of pump light, the measured intensity of the excitation light spectrum. Finally, through the data processing integrated threshold curve. Compared with the same perovskite structure in the normal glass substrate and the threshold curve of graphene, draw the conclusion. The regulation of graphene on the optical micro cavity is realized. At the same time, the COMSOL electromagnetic simulation software was used to simulate the structure of the perovskite structure, and its intrinsic solution was obtained, and the Q value was obtained, and the situation of graphene was compared. Finally, the exciton binding energy of the two kinds of conditions is measured by means of a cryogenic device, and the reason of this regulation is explained by the theory of Auger recombination for the first time in this paper.