An Optimization Method of Asymmetric Resonant Cavities for Unidirectional Emission

TL;DR

This paper presents a hill-climbing optimization method for asymmetric resonant cavities that enhances unidirectional emission, demonstrating significant energy concentration within a specified divergence angle.

Contribution

The paper introduces a novel hill-climbing algorithm for optimizing ARC shapes to achieve highly collimated, unidirectional emission with robustness to shape errors.

Findings

Achieved 46% of total radiated energy within 40-degree divergence.

Confirmed robustness of emission directionality against shape errors.

Validated the effectiveness of energy-based evaluation functions for optimization.

Abstract

In this paper, we studied the repeatability and accuracy of the ray simulation for one kind of Asymmetric Resonant Cavities (ARCs) Half-Quadrupole-Half-Circle shaped cavity, and confirmed the robustness of the directionality about the 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 unidirect ional emission. By this method, we optimized the ARCs to obtain about 0.46 of the total radiated energy in divergence angle of 40 degree 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.