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We experimentally demonstrate linearly polarized vertical emission from the hexapole mode of a single-cell photonic-crystal cavity with simple deformation. 68% of the photons of the resonant mode is funnelled within a divergence angle of plusmn45deg.
Electrically-driven single-cell 2-D slab photonic crystal lasers operating near 1550 nm at room temperature are discussed. Two nondegenerate resonant modes with a central node are experimentally demonstrated and studied. In addition, several schemes suitable for efficient photon out-coupling will also be addressed.
Characteristics of wavelength-scale photonic crystal cavity modes are controlled by utilizing the spatial symmetry. A robust photonic crystal single-cell structure supporting only one resonant lasing mode is proposed and demonstrated, based on the mirror symmetry selection rule. In addition, the directional vertical beaming is achieved through the loss engineering based on the symmetry perturbation,...
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