Topology flat band regulation and control method and system based on non-Hermite micro-ring resonant cavity array

• Main Authors: ZENG XIANJIANG, WANG CHENSHENG, YU HUI, DU WEICHAO, YE JUNWEI, DING LU
• Format: Patent
• Language: Chinese; English
• Published: 13.01.2023
• Subjects: OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS

The invention relates to a topology flat band regulation and control method and system based on non-Hermite micro-ring resonant cavity arrays. The method comprises the following steps: periodically arranging a plurality of micro-ring resonant cavity arrays into a one-dimensional diamond structure; the positions and the relative gain of a gain ring and a loss ring in the micro-ring resonant cavity array are regulated and controlled, so that topological phase change is realized, and topological common and topological non-common unit cell structures are constructed; a point light source is placed in the center of the micro-ring resonant cavity arrays, a body band mode is excited, and the non-Hermite AB cage effect is achieved; the point light sources are respectively placed at the edge positions of the plurality of micro-ring resonant cavity arrays so as to realize an energy gain type topological boundary state or a topological common local state caused by interference. The micro-ring resonant cavity array confi