Control of the photonic crystal waveguide over the beam profile of vertical-cavity surface-emitting lasers
光子晶体波导对垂直腔面发射激光器光束远场形貌的调控

The control of the photonic crystal waveguide over the beam profile of vertical-cavity surface-emitting lasers is investigated. The symmetric slab waveguide model is adopted to analyze the control parameters of the beam profile in the photonic-crystal vertical-cavity surface-emitting laser (PC-VCSEL). The filling factor (the ratio of the hole diameter to the lattice constant) and the etching depth control the divergence angle of the PC-VCSEL,and the low filling factor and the shallow etching depth are benef...