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17 March 2023 New ternary chalcopyrite semiconductors for mid-IR NLO frequency conversion
Peter G. Schunemann, Kevin T. Zawilski
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Proceedings Volume PC12405, Nonlinear Frequency Generation and Conversion: Materials and Devices XXII; PC124050J (2023) https://doi.org/10.1117/12.2654745
Event: SPIE LASE, 2023, San Francisco, California, United States
Abstract
The ternary chalcopyrite semiconductors AgGaS2, AgGaSe2, ZnGeP2, CdGeAs2, and most recently CdSiP2 are among the most efficient and widely-used nonlinear optical (NLO) crystals for mid-infrared frequency conversion involving interaction wavelengths beyond 4 microns. Here we survey the entire class of chalcopyrites – including II-IV-V2, I-III-VI2, and II-III2-VI4 (defect chalcopyrites) – in search of promising new NLO crystals offering high nonlinear coefficients, broad transparency ranges, low absorption losses, adequate birefringence for phase matching, and ideally congruent melting to allow for growth from stoichiometric melts by directional solidification. We report preliminary results on synthesis, growth, and characterization of the most promising candidates.
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Peter G. Schunemann and Kevin T. Zawilski "New ternary chalcopyrite semiconductors for mid-IR NLO frequency conversion", Proc. SPIE PC12405, Nonlinear Frequency Generation and Conversion: Materials and Devices XXII, PC124050J (17 March 2023); https://doi.org/10.1117/12.2654745
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KEYWORDS
Chalcopyrites
Frequency conversion
Mid-IR
Semiconductors
Nonlinear optics
Nonlinear crystals
Crystals
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