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arXiv · 1711.08440

Self-adjustment of a nonlinear lasing mode to a pumped area in a two-dimensional microcavity

Yuta Kawashima·Susumu Shinohara·Satoshi Sunada·Takahisa Harayama
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Abstract

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.

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Yuta Kawashima, Susumu Shinohara, Satoshi Sunada, Takahisa Harayama. 2017-11-22. Self-adjustment of a nonlinear lasing mode to a pumped area in a two-dimensional microcavity. https://doi.org/10.1364/prj.5.000b47

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