Quality Factors in Single-Defect Photonic-Crystal Lasers with Asymmetric Cladding Layers

摘要

We present quality factors of single-defect photonic-crystal resonant cavities with asymmetric cladding layers. The resonators studied here are dielectric slabs patterned with two-dimensional photonic crystals on a sapphire substrate. Three-dimensional finite-element and finite-difference time- domain routines were used to analyze the electromagnetic properties of these cavities. We observe that high quality factors (approximately 800) can be obtained in these cavities for reasonable structures with thick enough dielectric slabs. This work was motivated by the need to place photonic-crystal resonators on a substrate to improve heat dissipation in photonic-crystal lasers.