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Axial hexagonal evanescent fields in tapered multicore fiber for nanoparticles trapping and microsensing

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Abstract

By tapering a weakly-coupled MCF into a strongly-coupled MCF, supermode interference effects can be generated with the best extinction ratio, 47.4dB and tuning efficiency, 392nm/RIU. Up-conversion nanoparticles are attracted and aligned by hexagonal evanescent fields.

© 2020 The Author(s)

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