We analyze normal mode splitting in a pair of vertically coupled microdisk resonators. A full vectorial finite-element model is used to find the eigenfrequencies 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.
© 2012 Optical Society of America
Lasers and Laser Optics
Original Manuscript: August 7, 2012
Revised Manuscript: September 11, 2012
Manuscript Accepted: September 17, 2012
Published: October 3, 2012
Ivan S. Grudinin and Nan Yu, "Finite-element modeling of coupled optical microdisk resonators for displacement sensing," J. Opt. Soc. Am. B 29, 3010-3014 (2012)