Abstract
In this paper, we proposed a useful algorithm to optimize the shape of asymmetric resonant cavities
(ARCs). At first, we studied the repeatability and accuracy of the ray simulation on one kind of ARCs
(half-quadrupole-half-circle shaped cavity), and confirmed the robustness of the directionality under shape errors.
Based on these, we proposed a hill-climbing algorithm to optimize the ARCs for unidirectional emission. Different
evaluation functions of directionality were tested and we suggested using the function of energy contained in a
certain angle for highly collimated and unidirectional emission. By this method, we optimized the ARCs to obtain about
0.46 of the total radiated energy in divergence angle of 40° in the far field. This optimization method is very
powerful for the shape engineering of ARCs and could be applied in future studies of ARCs with specific emission
properties.
© 2013 IEEE
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