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Fabricated nanostructures exhibit strong enhancement in second-harmonic generation, indicating AlInP's promise for high refractive index applications.
Second-order nonlinear optical materials with high refractive index and wide transparency range are of high demand for various photonic applications. Here, we present nanostructures fabricated in wafer-bonded crystalline aluminum indium phosphide (AlInP). The nanostructures exhibit strong enhancement of second-harmonic generation due to higher-order anapole excitations. Our results illustrate the potential of AlInP for nonlinear nanophotonics.
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Kołkowski et al. (2025) studied this question.
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