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arXiv · 1709.07917

Cylindrical vector resonant modes achieved in planar photonic crystal cavities with enlarged air-holes

Kang Chang·Liang Fang·Chenyang Zhao·Jianlin Zhao·Xuetao Gan
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Abstract

We reveal a triangular-lattice planar photonic crystal supports Bloch modes with radially and azimuthally symmetric electric field distributions at the top band-edge of the first photonic band. Bifurcated from the corresponding Bloch modes, two cylindrical vector resonant modes are achieved by simply enlarging the central air-hole of the planar photonic crystal, which have high quality factors around 3,000 and small mode volume. The far-field radiations of the two resonant modes present high-quality cylindrical vector beam profiles. The resonant modes could be optimized by modifying the six nearest neighboring air-holes around the central defect. The cylindrically symmetric characteristics of the resonant mode's near- and far-fields might provide a new view to investigate light-matter interactions and device developments in planar photonic crystal cavities.

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Kang Chang, Liang Fang, Chenyang Zhao, Jianlin Zhao, Xuetao Gan. 2017-09-11. Cylindrical vector resonant modes achieved in planar photonic crystal cavities with enlarged air-holes. https://doi.org/10.1364/oe.25.021594

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