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Opt Express. 2008 Feb 18;16(4):2694-8.

High-efficiency photonic crystal microlaser integrated with a passive waveguide.

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Yokohama National University, Department of Electrical and Computer Engineering, 79-5 Tokiwadai, Hodogayaku, Yokohama 240-8501, Japan.


A GaInAsP photonic crystal slab microlaser with an integrated passive waveguide was fabricated by a MOCVD butt-joint regrowth process. The boundary between the active and passive regions was optimized for high light transmission. In addition, the edge of the waveguide was designed to output a narrow beam, and the light detection was improved. Consequently, a maximum output power of 0.17 mW was obtained with a differential quantum efficiency of 20%, which would increase to more than 40% under ideal detection conditions.

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