Cascaded third harmonic generation in lithium niobate nanowaveguides
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Solntsev, Alexander S.
Sukhorukov, Andrey
Iliew, Rumen
Geiss, Reinhard
Pertsch, Thomas
Kivshar, Yuri
Neshev, Dragomir
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American Institute of Physics
Abstract
We predict highly efficient third harmonic generation through simultaneous phase-matching of second-harmonic generation and sum-frequency generation in lithium niobate nanowaveguides, enabled due to strong modal dispersion. We demonstrate that the waveguide size which corresponds to phase-matching is also optimal for highest mode confinement and therefore for strongly enhanced conversion efficiency.
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Applied Physics Letters
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