A design method for highly integrated Raman high-order topological laser sources

Abstract

The invention discloses a highly integrated Raman high-order topological laser source design method, which includes the following steps: (1) starting from the BHZ (Bernevig-Hughes-Zhang) model, by adjusting the Hamiltonian perturbation term, the angle The topological phase corresponding to the state is the topological angle state; according to the Jackiw-Rebbi theory, a zero-energy bound state will be formed at the topological angle state, thereby further determining the geometric configuration, band gap position and intrinsic energy level of the Raman topological system; (2) Based on the geometric structure of topological photonic crystals, in the background of classical electromagnetism, the Raman nonlinear coupled wave equation is established, so that the topological cavity can meet the quasi-phase matching; and starting from the Raman nonlinear polarization, the coupled mode is described The nonlinear part in the theory; (3) for multi-angle mode matching, in addition to the coupling between the nearest neighbor lattices, the long-range coupling between the non-nearest neighbor lattices will cause the energy level splitting of the boundary state, resulting in other angles (4) Three-dimensional generalization and experimental measurement of topological angle states.

Description

technical field [0001] The invention relates to the field of nonlinear optics, in particular to a highly integrated Raman high-order topological laser source design method. Background technique [0002] Raman laser technology has important applications in the fields of medical treatment, medicine and trace substance detection due to its direct, accurate and non-destructive testing advantages. [0003] In recent years, with the transformation and upgrading of the industrial industry, the fields of medical diagnosis and medical testing are opening the era of intelligence, portability, big data and digitalization, and portable medical devices such as integrated monitors and handheld detectors have emerged as the times require. The development of Raman laser detection technology in the direction of intelligence, portability and integration has also become the general trend. [0004] Since big data and intelligent technology have very high requirements on the information process...

AI Technical Summary

Problems solved by technology

Combined with the research status at home and abroad, the Raman light sources reported so far still have problems such as large specifications and sizes

Images