Abstract:We describe techniques that enable fabrication of a new class of photonic devices based on free UH-Q microresonators. Preliminary results show that free silica microtoroids with Qs above 30 million can be fabricated and transferred to different platforms for integration with a variety of photonic devices. Greene, " Ultra-compact Si-SiO2 microring resonator optical channel dropping filters," IEEE Photon. Technol. Lett. 10, 549-551 (1998). 18. T. Baehr-Jones, M. Hochberg, C. Walker, A. Scherer, "High-Q ring resonators in thin silicon-oninsulator," Appl. Phys. Lett. 85, 3346-3347 (2004