Abstract
With high quality factors and ultrasmall mode volume, on the other hand, the improvements of fabrication, photonic crystal defect laser has become one of hot issues in electro-photon research in recent years. Typical photonic crystal defect laser is made as suspend-membrane structure. Suspend-membrane structure means using refractive index difference to confine vertical light. Due to low thermal conductivity of air, this kind of structure has poor heat dissipation so that it can not be operated in continuous wave (CW) condition, however, for future application of integrate photonic circuit, continuous wave operation is needed. To solving this problem, we using finite element method (FEM) and found using sapphire to be a heat sink, in addition, index difference between sapphire and air is small so that vertical confinement will not decrease a lot. Furthermore, we analyzed the thermal properties by using FEM to calculate thermal time constant and get the thermal resistance between these two types of structures.