High-Q lithium niobate microdisk resonators on a chip for efficient electro-optic modulation

Lithium niobate (LN) microdisk resonators on a LN-silica-LN chip were fabricated using only conventional semiconductor fabrication processes. The quality factor of the LN resonator with a 39.6-mu m radius and a 0.5-mu m thickness is up to 1.19x10(6), which doubles the record of the quality factor 4.84x10(5) of LN resonators produced by microfabrication methods allowing batch production. Electro-optic modulation with an effective resonance-frequency tuning rate of 3.0 GHz/V was demonstrated in the fabricated LN microdisk resonator. (C) 2015 Optical Society of America