X. Zhang, H. S. Choi, and A. M. Armani, "Effect of Substrate Impurities on the Q Factor of Toroidal Microcavities,"
in Frontiers in Optics 2010/Laser Science XXVI,
OSA Technical Digest (CD)
(Optical Society of America, 2010), paper FThP8.
We have experimentally demonstrated that the quality (Q) factor of the silica microtoroid depends on the silicon substrate dopant concentration. This dependence agrees well the theoretical prediction and calculation.