Laser Modes of Active Circular Microcavity with Circular Piercing Hole

Spectra, thresholds, and emission directivities of laser modes of a circular active microcavity with a circular piercing hole are calculated numerically as solutions of the Lasing Eigenvalue Problem reduced to the set of the Muller boundary integral equations. Here, we use a trigonometric-trigonometric meshless Galerkin discretization technique. The computational experiments demonstrate that a hole located at a proper place can lead to a notable growth of the directivity of the lasing emission while preserving a low threshold gain.