Research Of Properties Based On Hybrid Surface Plasmonic Waveguides With Gain Medium

With the rapid development of optoelectronics and nanotechnology,the demanding of integrated density on systems have become increasingly higher.Surface plasmons polaritons(SPPs)waveguides not only can furthest restrain the electromagnetic field at the interface between the metal and dielectric,but also have huge advantages in the application of the high speed data transmission photonics.It is essentially a kind of electron wave propagating along the metal surface generated from the interaction of electron and photon in the free vibration.It can break the diffraction limit,the integration density of the system will be greatly enhanced.In this paper,Based on the theory of surface plasmonic waveguides,we designed two kinds of hybrid plasmonic waveguide structures by introducing the suitable optical gain medium.Also,the properties of the proposed structures are deeply investigated with the finite element method,which provides a theoretical basis and design idea for the development of a new generation of nano-photonic integrated devices.The main work of this paper is as follows:(1)The background,condition of development and the future trend about the surface plasmons are introduced,As well,the related theory and gain medium material are proposed,What's more,the processing technology of waveguide devices especially the etching technology are described.At the same time,the numerical calculation method,finite element,is simply illustrated and brings up COMSOL Multiphysics based on it.The theoretical analysis provides the basis of the design and research of the waveguide structures.(2)A InGaAsP rectangular nanotubes based on hybrid plasmonic waveguide with gain medium are designed.We investigated the effect of the geometric parameters on the electric field distribution and the modal properties of the fundamental hybrid plasmonic mode with the finite element method.The structure has important application value in the field of high density photonic integrated system and optoelectronic integrated circuit.(3)A hybrid plasmonic waveguide structure with gain medium CdS nanowire isproposed.At the operating wavelength,we numerically simulated the electric field distribution and the modal properties of the fundamental mode changed by the geometric parameters.The result shows that it can realize a deep subwavelength scale under the condition of low propagation loss.This structure can be applied to the nanolaser.We further analysed the gain threshold and quality factor of the nanolaser and find suitable geometry size by optimizing the parameters.Compared with the nanolaser designed by Bian,the nanolaser,presented in the paper,has a lower gain threshod while maintaining low propagation loss.