Generalized analytical and numerical modeling of optical second harmonic generation in anisotropic crystals and complex heterostructures using ♯SHAARP package

Rui Zu; Bo Wang; Jingyang He; Lincoln Weber; Jian-Jun Wang; Long-Qing Chen; Venkatraman Gopalan

doi:10.1117/12.2676223

5 October 2023 Generalized analytical and numerical modeling of optical second harmonic generation in anisotropic crystals and complex heterostructures using ♯SHAARP package

Rui Zu, Bo Wang, Jingyang He, Lincoln Weber, Jian-Jun Wang, Long-Qing Chen, Venkatraman Gopalan

Author Affiliations +

Proceedings Volume 12681, Ultrafast Nonlinear Imaging and Spectroscopy XI; 1268106 (2023) https://doi.org/10.1117/12.2676223
Event: SPIE Optical Engineering + Applications, 2023, San Diego, California, United States

Abstract

Optical Second Harmonic Generation (SHG) is a nonlinear optical effect widely used for nonlinear optical microscopy and laser frequency conversion. The closed-form analytical solution of the nonlinear optical responses is essential for evaluating the optical responses of new materials whose optical properties are unknown a priori. Many approximations have therefore been employed in the existing analytical approaches, such as slowly varying approximation, weak reflection of the nonlinear polarization, transparent medium, high crystallographic symmetry, Kleinman symmetry, easy crystal orientation along a high-symmetry direction, phase matching conditions and negligible interference among nonlinear waves, which may lead to large errors in the reported material properties. To avoid these approximations, we have developed an open-source package named Second Harmonic Analysis of Anisotropic Rotational Polarimetry (♯SHAARP) for single interface (si) and in multilayers (ml) for homogeneous crystals. The reliability and accuracy are established by experimentally benchmarking with both the SHG polarimetry and Maker fringes predicted from the package using standard materials. SHAARP.si and SHAARP.ml are available through GitHub https://github.com/Rui-Zu/SHAARP and https://github.com/bzw133/SHAARP.ml, respectively.

Conference Presentation

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Rui Zu, Bo Wang, Jingyang He, Lincoln Weber, Jian-Jun Wang, Long-Qing Chen, and Venkatraman Gopalan "Generalized analytical and numerical modeling of optical second harmonic generation in anisotropic crystals and complex heterostructures using ♯SHAARP package", Proc. SPIE 12681, Ultrafast Nonlinear Imaging and Spectroscopy XI, 1268106 (5 October 2023); https://doi.org/10.1117/12.2676223

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