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拓微激光器与一个非赫密特拓散量

Zhitong Li¹, Xi-Wang Luo², Dayang Lin³

¹Department of Electrical and Computer Engineering, The University of Texas at Dallas, Richardson, Texas 75080, USA.

Physical review letters

|July 28, 2023

概括

这项研究证明了在非赫密斯系统中的拓边形模式激光,建立了定义良好的批量拓和批量边形对应. 这项研究为非赫米特拓设备和应用开辟了新的途径.

科学领域:

物质的拓性状态.
非赫米特物理学的物理学.
光子学是指光子学的使用方法.

背景情况:

大量边缘对应是拓物质的关键特征,将大量拓与受保护的边缘状态联系起来.
虽然在赫米特系统中已经很成熟,但在非赫米特系统中大量边缘对应的行为仍然是一个活跃的研究领域.
非密封性提供了独特的特性和设备潜力,但在拓激光器中定义批量拓是具有挑战性的.

研究的目的:

提出并实验性地研究具有定义良好的非赫米斯体积拓的拓边缘模式激光.
在非赫尔密斯系统中建立一个清晰的批量边缘对应.
探索非赫密斯拓设备中的潜在应用.

主要方法:

使用一维配列的合环共振器.
以一个额外的合成维度建模了哈密尔顿系统.
建立了1D结构和2D非赫米蒂安切尔恩绝缘体之间的等价性.

主要成果:

成功演示了拓边缘模式激光.
实现了一个明确的非赫密斯体积拓.
在拟议的系统中建立了一个清晰的散装边缘对应.

结论:

拟议的系统为研究非赫尔密斯拓效应提供了一个平台.
这项工作可能为新型非赫米特拓装置应用铺平道路.
在非赫米特系统中建立的批量边缘对应对于未来的拓设备设计至关重要.

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Standing Waves in a Cavity

Standing Waves in a Cavity

A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by: