【摘要】 使用时域有限差分方法系统地研究了直径从2μm到50μm的GaN基微盘在蓝光波段的模式强度和分布。设计了一种可以比拟微盘内高密度激子分布的偶极子排布方式,使其能够激发盘内所有光学模式。研究了盘内最大激发强度和有效共振频率数量随微盘直径的变化关系,揭示了盘内模式间的竞争关系,并给出了微盘内三种典型的激发后的光场分布。更多还原

【Abstract】 The finite-difference time-domain method was used to systematically study the intensity and distribution of the GaN microdisks with diameters from 2μm to 50μm in the blue light region.A dipole arrangement that could match the distribution of high-density exciton within the microdisk was designed to enable it to excite all optical modes in the disk.The relationship of the maximum excitation intensity and the number of effective resonance frequencies in the disk with the diameter of the microdisk was studied,and the competitive relationship among the intradiscal patterns was revealed.Three typical excitation field distributions in the microdisk were presented.更多还原