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aluminum scandium nitride 1cryogenic signal processing 1molecular beam epitaxy 1nonlinear optics 1photonic devices 1piezoelectric transducers 1quantum circuit integration 1second-order nonlinearity 1superconducting nanowires 1surface acoustic waves 1

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cond-mat.mtrl-sci2026

Second-Order Optical Nonlinearity of AlScN Films Grown By Molecular Beam Epitaxy

Joongwon Lee, Thai-Son Nguyen, Len van Deurzen +8

The paper measures the second‑order optical nonlinearity of AlScN films grown by molecular beam epitaxy directly on nitrided c‑plane sapphire, finding a greatly enhanced d31 coeffi…