]. V. Ilchenko, Optical Resonators With Whispering-GalleryModes?Part II: Applications Wavelength-dependence of a vertically-coupled resonator-waveguide system Coupled mode analysis of micro-disk resonators with an asymmetric-index-profile coupling region, IEEE J. of Select. Topics in Quantum Electronics Journal of Lightwave Technology, vol.12, issue.53853, pp.2016-10090, 2006.