Finite element modeling of coupled optical microdisk resonators for   displacement sensing
  We analyze normal mode splitting in a pair of vertically coupled microdisk resonators. A full vectorial finite element model is used to find the eigen frequencies of the symmetric and antisymmetric composite modes as a function of coupling distance. We find that the coupled microdisks can compete with the best Fabry-Perot resonators in displacement sensing. We also show how we configured FreeFem++ for the sphere eigenvalue problem. 
Ivan Grudinin and Nan Yu
physics.optics physics.comp-ph physics.ins-det