Laterally Confined Modes in Wet-Etched, Metal-Coated, Quantum-Dot-Inserted Pillar Microcavities
ZHANG Hao1, ZHENG Hou-Zhi1, ZHANG Ji-Dong1, XU Ping1, TAN Ping-Heng1, YANG Fu-Hua1, ZENG Yi-Ping2
1State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductor, Chinese Academy of Sciences, PO Box 912, Beijing 100083
2Novel Material Department, Institute of Semiconductor, Chinese Academy of Sciences, PO Box 912, Beijing 100083
Laterally Confined Modes in Wet-Etched, Metal-Coated, Quantum-Dot-Inserted Pillar Microcavities
1State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductor, Chinese Academy of Sciences, PO Box 912, Beijing 100083
2Novel Material Department, Institute of Semiconductor, Chinese Academy of Sciences, PO Box 912, Beijing 100083
Abstract： We report the fabrication and the measurement of microcavities whose optical eigenmodes were discrete and were well predicted by using the model of the photonic dot with perfectly reflected sidewalls. These microcavities consisted of the semiconductor pillar fabricated by the simple wet-etched process and successive metal coating. Angle-resolved photoluminescence spectra demonstrate the characteristic emission of the corresponding eigenmodes, its pattern revealed by varying both polar (θ) and azimuthal (Ф) angles. It is shown that the metal-coated sidewalls can provide an efficient way to suppress the emission due to the leaking modes in these pillar microcavities.
2004, Vol. 21 
