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arXiv · 1312.3373

Larger-area single-mode photonic crystal surface-emitting lasers enabled by an accidental Dirac point

Song-Liang Chua·Ling Lu·Jorge Bravo-Abad·John D. Joannopoulos·Marin Soljacic
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Abstract

By altering the lattice geometry of the photonic crystal surface-emitting lasers (PCSELs), we tune the regular lasing band edges of quadratic dispersions to form a single accidental Dirac point of linear dispersion at the Brillouin zone center. This not only increases the mode spacing by orders of magnitude, but also eliminates the distributed in-plane feedback to enable single-mode PCSELs of substantially larger area thus substantially higher output power. The advantages of using accidental Dirac cones are systematically evaluated through two-dimensional in-plane calculations and confirmed by three-dimensional simulations of photonic crystal slab devices.

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Song-Liang Chua, Ling Lu, Jorge Bravo-Abad, John D. Joannopoulos, Marin Soljacic. 2013-12-12. Larger-area single-mode photonic crystal surface-emitting lasers enabled by an accidental Dirac point. https://doi.org/10.1364/ol.39.002072

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