Abstract
We describe a method that enables free-standing whispering-gallery-mode microresonators, and report spectral tuning of photonic molecules formed by coupled free and on-chip resonators with different geometries and materials. We study direct coupling via evanescent fields of free silica microtoroids and microspheres with on-chip polymer coated silica microtoroids. We demonstrate thermal tuning of resonance modes to achieve maximal spectral overlap, mode splitting induced by direct coupling, and the effects of distance between the resonators on the splitting spectra.
© 2012 Optical Society of America
Full Article | PDF ArticleMore Like This
Torsten Beck, Steffen Schloer, Tobias Grossmann, Timo Mappes, and Heinz Kalt
Opt. Express 20(20) 22012-22017 (2012)
Ramgopal Madugani, Yong Yang, Jonathan M Ward, John Daniel Riordan, Sara Coppola, Veronica Vespini, Simonetta Grilli, Andrea Finizio, Pietro Ferraro, and Síle Nic Chormaic
Opt. Lett. 37(22) 4762-4764 (2012)
Thanh Xuan Hoang, Sara Nicole Nagelberg, Mathias Kolle, and George Barbastathis
Opt. Express 25(12) 13125-13144 (2017)