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Efficient side-coupling to photonic crystal nanobeam cavities via state-space overlap

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arxiv 1805.09438 v2 pith:IROEEMHC submitted 2018-05-23 physics.optics

Efficient side-coupling to photonic crystal nanobeam cavities via state-space overlap

classification physics.optics
keywords photonicside-coupledcavitiescavitycrystaldesignefficientnanobeam
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We present design guidelines for realizing side-coupled photonic crystal nanobeam (PCN) cavities with efficient coupling to low order resonances through adjusting the overlap of the PCN cavity mode and a feeding bus waveguide in both physical and k-space. We show that optimal side-coupled configurations function at a non-zero k-vector offset between the bus waveguide and PCN cavity modes. The straightforward design of side-coupled PCNs with high contrast resonances opens the door to their practical implementation in multiplexed, on-chip photonic devices.

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