PROJECT TITLE :

Mode Switching of High Index Contrast Photonic Crystal Surface Emitting Lasers

ABSTRACT:

This paper investigates the phenomenon of mode switching for GaAs-primarily based high index contrast photonic crystal surface emitting lasers (PCSELs) with deeply etched air holes. The area-temperature lasing characteristics and angular resolved photoluminescence spectra of PCSELs show that the lasing mode would change from the fundamental guided mode to a high-order guided mode because the filling factor (FF) increased, ensuing from the diffraction of deeply etched semiconductor/air arrays with high index distinction. Higher order guided modes might coherently couple out of photonic crystal and would significantly influence the laser output of PCSELs with a bigger air FF, leading to wealthy way-field characteristics.