Nanohardness of CdSiP2 and ZnGeP2 chalcopyrites used in nonlinear optics

Ginka Exner; Peter Schunemann; Aleksandar Grigorov; Elizabeth Ivanova; Kevin Zawilski; Vladimir Tassev; Valentin Petrov

doi:10.1117/12.3001757

13 March 2024 Nanohardness of CdSiP₂ and ZnGeP₂ chalcopyrites used in nonlinear optics

Ginka Exner, Peter Schunemann, Aleksandar Grigorov, Elizabeth Ivanova, Kevin Zawilski, Vladimir Tassev, Valentin Petrov

Proceedings Volume PC12869, Nonlinear Frequency Generation and Conversion: Materials and Devices XXIII; PC128690I (2024) https://doi.org/10.1117/12.3001757
Event: SPIE LASE, 2024, San Francisco, California, United States

Abstract

We study the hardness and Young’s modulus of CdSiP₂ (CSP) and ZnGeP₂ (ZGP), two widely used chalcopyrites for mid-IR nonlinear frequency conversion. Nanoindentation with a Berkovich tip is applied for precise load control. Microhardness values from the literature are scattered but still indicate higher hardness for the compound with wider bandgap and higher melting point, i.e. CSP. Our measurements with optically polished single-crystal samples of random orientation give nanohardness of 9.9 and 11.5 GPa, and Young’s modulus of 136 and 150 GPa, for CSP and ZGP, respectively. We compare the obtained results with GaP, the binary isoelectronic analog of ZGP.

Conference Presentation

Citation Download Citation

Ginka Exner, Peter Schunemann, Aleksandar Grigorov, Elizabeth Ivanova, Kevin Zawilski, Vladimir Tassev, and Valentin Petrov "Nanohardness of CdSiP₂ and ZnGeP₂ chalcopyrites used in nonlinear optics", Proc. SPIE PC12869, Nonlinear Frequency Generation and Conversion: Materials and Devices XXIII, PC128690I (13 March 2024); https://doi.org/10.1117/12.3001757

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