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This study demonstrates nonlinear frequency conversion in periodically poled lithium tantalate waveguides, implying new applications in photonics.
We demonstrate, for the first time, periodically poled thin-film lithium tantalate waveguides capable of second-order nonlinear frequency conversion. We show that the poling process does not require MgO doping to reduce the coercive field.
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Kuznetsov et al. (2025) studied this question.
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