10 February 2009 Ultra-small photonic crystal zero-cell laser cavities
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We investigate optical characteristics of the ultra-small zero-cell cavities that consist of two, four and three shifted lattice points in square- and triangular-lattice photonic crystal structures. Mode volumes and Q factors of these cavities are systematically studied using three-dimensional finite-difference-time-domain simulation. In particular, an extremely small mode volume of ~0.015 μm3 [~1.5 (λ/2nslab)3] is obtained in the triangular-lattice three-hole-shifted cavity. In an experiment, we demonstrate optically pumped room-temperature lasing action with a low lasing threshold of ~130 μW in a square-lattice two-hole-shifted cavity. The operation of this ultra-small laser is unambiguously confirmed by the numerical simulation based on the actual fabricated structures.
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Ho-Seok Ee, Ho-Seok Ee, Hong-Gyu Park, Hong-Gyu Park, } "Ultra-small photonic crystal zero-cell laser cavities", Proc. SPIE 7219, Optoelectronic Integrated Circuits XI, 72190G (10 February 2009); doi: 10.1117/12.809635; https://doi.org/10.1117/12.809635

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