Department of Physics, Engineering Physics & Astronomy

Department of Physics, Engineering Physics & Astronomy
Department of Physics, Engineering Physics & Astronomy

3D Optical Microcavities

Jeff Young
University of British Columbia

Friday, October 28, 2005
11:30 AM @ Stirling 201

Abstract:

Semiconductors such as GaAs, InP, and Si are transparent in the near infrared, and have a refractive index on the order of 3. Sophisticated microfabrication techniques for patterning them on sub-micron lengthscales exist, and so they make ideal host materials for engineering wavelength-scale, high-index-contrast optical components. The high index contrast (as compared to glass-based optical components) opens interesting new opportunities for studying fundamental physics, and possibly for the development of qualitatively new applications.

I will briefly review the relevant fabrication technologies, and explain why high-index-contrast dielectric texture can have dramatic effects on both linear and nonlinear optical properties of these semiconductors. Emphasis will be placed on demonstrating large second and third order nonlinear response characteristics of both linear waveguides and 3D microcavities, at relatively low optical power levels. Recent results on silicon-on-insulator microcavities with Q values in excess of 30,000 will be presented.