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(a) Illustration of a W3 photonic crystal membrane waveguide. PC design parameters are value of 0.3 and value of 0.6, where , , and are the crystal lattice constant, hole radius, and membrane thickness, respectively. (b) Corresponding calculated dispersion diagram for the W3 photonic crystal waveguide in (a).
(a) Illustration of the W3 photonic crystal heterostructure cavity. The cavity is formed by increasing the lattice constant at the center of a W3 photonic crystal membrane waveguide by 2.5%. (b) Calculated quality factor spectrum for the photonic crystal heterostructure cavity in (a). Mode A (normalized frequency of 0.272) and mode B (normalized frequency of 0.296) are studied for our cavities.
(a) SEM micrograph showing one heterostructure photonic crystal cavity. (b) Magnified view of the heterostructure cavity region. The lattice constant at the center of the cavity is , and that in the other regions is .
(a) Lasing spectrum (two lasing wavelengths, 1444 and ) of a PC heterostructure cavity, and calculated resonance wavelengths with values for this cavity. (b) Light-in light-out curves of this PC heterostructure cavity. The lasing thresholds are around and for the two lasing modes. (c) Lasing spectrum collected from one facet of this PC heterostructure cavity with fiber.
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