Abstract
In most of Photonic crystal (PC)-based VCSELs, PCs are use in their photonic band-gap regime (micro-cavities). Many works report a PC-based defect structure etched into the top DBR of a VCSEL, in order to promote single transverse mode operation. However, the virtue of PCs is not to provide only photonic band gaps, allowing efficient trapping of photons, but also photonic band edge extremes with low curvature, which result in guided modes with low group velocity. When excited above the light-line, these slow bloch modes generally suffer from optical losses due to their coupling with radiated modes, which is considered as a major drawback of integrated circuits based on waveguiding PC structures.
© 2007 IEEE
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