[2] K. J. Vahala. Optical microcavities. Nature, 424, 839-846(2003).
[20] A. Schliesser, T. J. Kippenberg. Cavity optomechanics with whispering-gallery-mode optical micro-resonators. Atomic, Molecular, and Optical Physics, 58, 207-323(2010).
[25] G. N. Conti, S. Berneschi, F. Cosi, S. Pelli, S. Soria, G. C. Righini, P.-H. Merrer, M. Dispenza, A. Secchi. Coupling of angle polished waveguides to high-Q whispering gallery mode resonators. The European Conference on Lasers and Electro-Optics, CK_P9(2011).