Abstract
We report experiments and modeling of surface plasmon resonance (SPR)-assisted coupling to whispering-gallery modes in dielectric microresonators. Our experiments use a gold-coated glass-prism that is evanescently coupled to a -diameter silica-micropillar resonator. We find nearly 12-fold enhancement in the whispering-gallery resonance extinction ratio in the vicinity of the SPR angle using a gold-film. The measured trends of the enhancement, as a function of the laser-beam incident angle and the gold-film thickness, show good qualitative agreement with our modeling of SPR-assisted coupling to ring resonator modes. Our modeling suggests that the far-field interference between the SPR-enhanced microresonator mode field and the attenuated total internal reflected field from the prism gives the observed extinction ratio enhancement.
© 2007 Optical Society of America
Full Article | PDF ArticleMore Like This
M. L. Gorodetsky and V. S. Ilchenko
J. Opt. Soc. Am. B 16(1) 147-154 (1999)
Ho-Tong Lee and Andrew W. Poon
Opt. Lett. 29(1) 5-7 (2004)
Carolin Klusmann, Radius N. S. Suryadharma, Jens Oppermann, Carsten Rockstuhl, and Heinz Kalt
J. Opt. Soc. Am. B 34(7) D46-D55 (2017)