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A tunable optical filter based on the electrowetting controlled sagging effect of a liquid droplet on a waveguide Bragg grating formed superhydrophobic substrate

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Abstract

A tunable optical filter combining a waveguide Bragg grating and the electrowetting controlled sagging effect of a liquid droplet is proposed. A tuning range above 40 nm with a bandwidth of 0.6 nm is achieved.

© 2019 The Author(s)

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