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Lithium niobate micro-disk resonators of quality factors above 107

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Abstract

We report on the fabrication of crystalline lithium niobate microresonators with quality factors above 107, as measured around 770 nm wavelength. Our technique relies on femtosecond laser micromachining for patterning a mask coated on the lithium niobate on insulate (LNOI) into a microdisk, followed by a chemo-mechanical polishing process for transferring the disk-shaped pattern to the LNOI. Nonlinear processes including second-harmonic generation and Raman scattering have been demonstrated in the fabricated microdisk.

© 2018 Optical Society of America

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