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We propose and investigate two-dimensional photonic-crystal lasers with a centered-rectangular lattice, which spans the lattice structure between the conventional square and triangular lattices.
We found that tighter focal spots with longer depths of focus are achieved by radially polarized annular beams with controlled inner and outer radii, which could lead to high-tolerance, super-resolution applications in compact optical systems.
Advances in high-efficiency, large-area, surface-emitting photonic-crystal lasers have been developed to achieve peak emission powers of 35 W with a slope efficiency of 0.7 W/A for a total device area of ~0.4 mm2.
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