This year's topic is optical microcavities and their device applications. Introduction to various types of optical microcavities (microdisks, microspheres, and photonic crystal cavities), their electromagnetic properties, design and fabrication techniques. Fundamentals of cavity quantum electrodynamics: strong and weak-coupling regime, Purcell factor, spontaneous emission control. Applications of optical microcavities, including low-threshold lasers, resonant cavity light emitting diodes, and single-photon sources. Prerequisites: Advanced undergraduate or basic graduate level knowledge of electromagnetics, quantum mechanics, and physics of semiconductors. 3 units. Instructor: Vuckovic