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17 March 2023 ♯SHAARP: an open-source package for analytical and numerical modeling of optical second harmonic generation in anisotropic crystals
Rui Zu, Bo Wang, Jingyang He, Jianjun Wang, Lincoln Weber, Long-Qing Chen, Venkatraman Gopalan
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Proceedings Volume PC12405, Nonlinear Frequency Generation and Conversion: Materials and Devices XXII; PC124050V (2023) https://doi.org/10.1117/12.2647729
Event: SPIE LASE, 2023, San Francisco, California, United States
Abstract
Optical second harmonic generation (SHG) is a process that doubles the photon frequency and is widely used to detect broken inversion symmetry and local polar order. Analytical SHG modeling is essential to connect experimental results to material properties, such as point group symmetry and SHG susceptibilities. However, complexity builds up when the crystal exhibits low symmetry, absorption, and consists of multiple interfaces. Thus, the SHG model in the literature involves many approximations, leading to a scattered dataset of reported SHG properties. Here, we have developed an open-source package called ♯SHAARP which derives analytical solutions and performs numerical simulations of reflected SHG from crystals with arbitrary symmetry group, orientation, complex and anisotropic linear dielectric tensors with frequency dispersion, a general SHG tensor, and any polarization state of the incident and SHG light. ♯SHAARP enables accurate SHG analysis of a broad range of materials.
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Rui Zu, Bo Wang, Jingyang He, Jianjun Wang, Lincoln Weber, Long-Qing Chen, and Venkatraman Gopalan "♯SHAARP: an open-source package for analytical and numerical modeling of optical second harmonic generation in anisotropic crystals", Proc. SPIE PC12405, Nonlinear Frequency Generation and Conversion: Materials and Devices XXII, PC124050V (17 March 2023); https://doi.org/10.1117/12.2647729
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KEYWORDS
Crystals
Second-harmonic generation
Nonlinear crystals
Crystallography
Harmonic generation
Numerical modeling
Polarimetry
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