Modal Analysis of Optomagnonic Resonators (Invited paper)

In this work modal analysis of optomagnonic resonators composed by magnetic garnet spheres is presented. The linearly and partial circularly polarized whispering-gallery-modes (WGMs) appearing in magneto-optical (MO) coupling, are theoretically verified, and rigorous mode designation is attributed to them. To carry out the study, a volume integral equation method is employed which supports anisotropic permittivities. The method is particularly tuned for addressing high mode order resonances. To this end, the volume integral equation is supplmemented by an asymptotic vectorial basis, enabling the accurate computation of high order eigenbasis required to solve the problem.