Highly-integrated Raman high-order topological laser source design method

Abstract

The invention discloses a highly-integrated Raman high-order topological laser source design method, which comprises the following steps of: (1) starting from a BHZ (Brown-Harmonic-Zhang) model, obtaining a topological phase corresponding to an angular state, namely a topological angular state, by adjusting a perturbation item of Hamiltonian; according to a JackiwRebbi theory, forming a zero-energy constraint state at a topological angular state, so that the geometric configuration, the band gap position and the intrinsic energy level of the Raman topological system are further determined; (2)based on the topological photonic crystal geometric structure, establishing a Raman nonlinear coupling wave equation under the background of classical electromagnetism so as to enable a topological cavity to meet quasi-phase matching; starting from Raman nonlinear polarization intensity, describing a nonlinear part in a coupling mode theory; (3) performing multi-angular-state mode matching, except for the coupling effect between nearest neighbor lattices, so that the long-range coupling effect between non-nearest neighbor lattices can cause energy level splitting of a boundary state, and other angular states are generated; and (4) performing three-dimensional popularization and experimental measurement of the topological angular state.

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

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