Self-adjustment of a nonlinear lasing mode to a pumped area in a two-dimensional microcavity [Invited]
Self-adjustment of a nonlinear lasing mode to a pumped area in a two-dimensional microcavity [Invited]
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DOI：
10.1364/prj.5.000b47
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发表时间：
2017-12-01
影响因子：
7.6
通讯作者：
Harayama, Takahisa
中科院分区：
文献类型：
--
作者：
Kawashima, Yuta;Shinohara, Susumu;Harayama, Takahisa
基于麦克斯韦-布洛赫(MB)模型，对空间选择泵浦的四极变形微腔激光器进行了数值模拟。我们演示了非对称激光模式的出现，它的空间模式违背了腔的x和y轴镜对称性。动力学模拟表明，由顺时针或逆时针旋转波组成的激光模式是MB模型的稳定定态解。根据被动腔模分析的结果，我们通过锁定四个近乎简并的被动腔模来解释这些非对称旋波激光模式。为了进行比较，我们对均匀泵浦情况进行了模拟，发现对于接近简并的模式有不同的锁定规则。我们的结果证明了激光模式的形成是一种非线性的动力学机制，这种模式可以调节到泵浦面积。(三)2017中国激光出版社
We numerically performed wave dynamical simulations based on the Maxwell-Bloch (MB) model for a quadrupole-deformed microcavity laser with spatially selective pumping. We demonstrate the appearance of an asymmetric lasing mode whose spatial pattern violates both the x-and y-axes mirror symmetries of the cavity. Dynamical simulations revealed that a lasing mode consisting of a clockwise or counterclockwise rotating-wave component is a stable stationary solution of the MB model. From the results of a passive-cavity mode analysis, we interpret these asymmetric rotating-wave lasing modes by the locking of four nearly degenerate passive-cavity modes. For comparison, we carried out simulations for a uniform pumping case and found a different locking rule for the nearly degenerate modes. Our results demonstrate a nonlinear dynamical mechanism for the formation of a lasing mode that adjusts its pattern to a pumped area. (C) 2017 Chinese Laser Press