Theoretical study of 1D gradient photonic structures with quartic polynomial dielectric profile formed by AllGa1-lAs varying pressure and temperature under oblique incidence

Abstract

In this work it is presented a theoretical study of the optical properties of 1D photonic systems with gradient dielectric profile layers of quartic polynomial type, using the dielectric AllGa1-lAs being the Al concentration along the width of the slab as the gradient function, when external parameters as the pressure and the temperature are considered. It is shown that the proposed gradient profile admits an analytic approach supported on the method of series to find the solutions of the wave equations for the TE and TM polarizations. Also, it is proposed a new regression model for the calculation of the dielectric value of AllGa1-lAs as a function of the pressure and temperature. The results showed that the increase in the pressure shifts and changes the transmission bands due to the decrease in the dielectric mean value of the gradient slab. On the other hand, it is found that the increase in the temperature shifts the transmission bands to lower frequencies but without changing their shape distribution. Considering the inclusion of graphene, it is observed its effect on the distribution of the transmission bands at different frequencies depending on the graphene properties. It is expected that the proposed structure can be contribute to the development of new devices when the pressure, the temperature and the chemical potential of graphene are used as external tunable parameters.