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Second-harmonic generation in nanophotonic PPLN waveguides with ultrahigh efficiencies

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Abstract

We demonstrate second-harmonic generation in periodically poled lithium niobate nanophotonic waveguides with normalized conversion efficiencies up to 2600%/W-cm2. We achieve a 53% conversion within a 4-mm long waveguide at a pump power of 220 mW.

© 2018 The Author(s)

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