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首页> 外文期刊>IEEE Journal of Quantum Electronics: A Publication of the IEEE Quantum Electronics and Applications Society >Mode Switching of High Index Contrast Photonic Crystal Surface Emitting Lasers
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Mode Switching of High Index Contrast Photonic Crystal Surface Emitting Lasers

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This paper investigates the phenomenon of mode switching for GaAs-based high index contrast photonic crystal surface emitting lasers (PCSELs) with deeply etched air holes. The room-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 as the filling factor (FF) increased, resulting from the diffraction of deeply etched semiconductor/air arrays with high index contrast. Higher order guided modes could coherently couple out of photonic crystal and would significantly influence the laser output of PCSELs with a larger air FF, leading to rich far-field characteristics.

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