Acousto-optic modulation in lithium niobate on sapphire

• Published in: arXiv.org
• Main Authors: Sarabalis, Christopher J, McKenna, Timothy P, Patel, Rishi N, Raphaël Van Laer, Safavi-Naeini, Amir H
• Format: Paper
• Language: English
• Published: Ithaca Cornell University Library, arXiv.org 02.05.2020
• Subjects: Acousto-optics; Acoustooptical devices; Broadband; Coupling coefficients; Crystal structure; Lithium niobates; Modulators; Piezoelectricity; Sapphire

We demonstrate acousto-optic phase modulators in X-cut lithium niobate films on sapphire, detailing the dependence of the piezoelectric and optomechanical coupling coefficients on the crystal orientation. This new platform supports highly confined, strongly piezoelectric mechanical waves without sus...