Entropic measure of directional emissions in microcavity lasers

Abstract

We propose a noble notion of the directional emission in microcavity lasers. First, Shannon entropy of the far-field profiles in the polar coordinate can quantify the degree of unidirectionality of the emission, while previous notions about the unidirectionality can not efficiently measure in the robust range against a variation of the deformation parameter. Second, a divergence angle of the directional emission is defined phenomenologically in terms of full width at half maximum, and it is barely applicable to a complicated peak structure. However, Shannon entropy of semi-marginal probability of the far-field profiles in the cartesian coordinate can present equivalent results, and moreover it is applicable to even the cases with a complicated peak structure of the emission.

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References in corpus (3)

• Combining directional light output and ultralow loss in deformed microdisks
• Imaginary couplings in non-Hermitian coupled-mode theory: Effects on exceptional points of optical resonators
• Optimization of conformal whispering gallery modes in limaçon-shaped transformation cavities

Cited by in corpus (2)

• Hidden quantum-classical correspondence in chaotic billiards revealed by mutual information
• Decomposed entropy and estimation of output power in deformed microcavity lasers