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Opt Lett. 2011 Nov 1;36(21):4140-2. doi: 10.1364/OL.36.004140.

Lateral cavity photonic crystal surface-emitting laser with ultralow threshold.

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  • 1Nano-optoelectronics Lab, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China.


A lateral cavity photonic crystal (PhC) surface-emitting laser is realized on a commercial epitaxial waveguide wafer without a distributed Bragg reflector first. Energy is coupled from the lateral resonance to surface-emitting light through the Γ band edge of the PhC with a square lattice. Electrically driven 1553.8 nm surface-emitting lasing action is observed at room temperature. The threshold current density of 667 A/cm2 is ultralow for the surface-emitting laser.

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