Michael Scalora,1 Laura Rodríguez-Suné,2 Kent A Hallman,3 Josep Trull,2 Crina Cojocaru,2 Maria Antonietta Vincenti4
1U.S. Army Combat Capabilities Development Command (United States) 2Univ. Politècnica de Catalunya (Spain) 3PeopleTec, Inc. (United States) 4Univ. degli Studi di Brescia (Italy)
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We present experimental measurements of SHG and THG in the visible and UV ranges from crystalline silicon membranes 200nm to 2microns in thickness, and use the physical parameters retrieved to predict the properties of silicon metasurfaces. Our theoretical model predicts well both spectral and angular responses and efficiencies of the membranes. Silicon is centrosymmetric but possesses a third order nonlinearity that is dispersive and relatively large in the UV range. The results also suggest that judicious exploitation of the nonlinear dispersion of ordinary semiconductors has the potential to transform device physics well into the UV range.
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Michael Scalora, Laura Rodríguez-Suné, Kent A Hallman, Josep Trull, Crina Cojocaru, Maria Antonietta Vincenti, "Harmonic generation from silicon membranes in the visible and UV ranges (Conference Presentation)," Proc. SPIE PC12196, Active Photonic Platforms 2022, PC1219602 (13 October 2022); https://doi.org/10.1117/12.2633396