Optimization for the high-Q monopole mode in electrically driven single-cell photonic crystal laser cavity

Zhu, Zhihong; Ye, Weimin; Ji, Jiarong; Yuan, Xiaodong; Zen, Chun

doi:10.1364/josab.24.000037

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2009

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Truncated photonic crystal cavities with optimized mode confinement

Bauer

Werner

Cary

2008

Journal of Applied Physics

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Optimization of a truncated, dielectric photonic crystal cavity leads to configurations that are far from truncated crystal cavities, and which have significantly better radiation confinement. Starting from a two-dimensional truncated photonic crystal cavity with optimal Q-factor, moving the rods from the lattice positions can increase the Q-factor by orders of magnitude, e.g., from 130 to 11 000 for a cavity constructed from 18 rods. In the process, parity symmetry breaking occurs. Achieving the same Q-factor with a regular lattice requires 60 rods. Therefore, using optimized irregular structures for photonic cavities can greatly reduce material requirements and device size.

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