Open AccessBirefringent whispering gallery cavities designed by linear transformation optics
Author(s) -
Sang-Jun Park,
Jeong-Hee Lim,
Yong-Hoon Lee,
Inbo Kim,
Jinhang Cho,
Seog-Hoon Rim,
Muhan Choi
Publication year - 2021
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.417744
Subject(s) - whispering gallery wave , optics , transformation optics , physics , whispering gallery , conformal map , transformation (genetics) , coordinate system , resonator , metamaterial , geometry , mathematics , biochemistry , chemistry , gene
It was reported that whispering gallery cavities designed by conformal transformation optics can support high-Q resonant modes with emission directionality. Intrinsically, these cavities have gradient index profiles implementing conformal mappings in physical space. In this paper, using the linear coordinate transformation, we propose another design scheme of whispering gallery cavities with (piecewise-) homogeneous, anisotropic index profile. We numerically show that so-designed cavities are also able to support high-Q whispering gallery modes with directional far-field emission patterns. We verify such characteristics by using a phase space representation (called the Poincaré Husimi function) of the intracavity wave function.