InGaAs/GaAs Quantum Well Microcavities with Spatially Controlled Carrier Injection

摘要

Micro-optical-cavity lasers are desired for optoelectronic integration. Inparticular, high quality factor (Q) cavities are obtained with circular microdisksand/or micro-cylinders. These devices are suitable for processing light emissionparallel to the substrate in a fashion similar to electronic transport betweentransistors in integrated microelectronic circuits. A limitation in these devices isthe lack of light directionality, poor control over its spectral behavior, and thesmall external differential quantum efficiency. Recently, there has been interest inoptical cavities with boundaries based on chaotic billiards, particularly stadiumstructures, where enhancement in light directionality is proposed.'