2026-04-17T16:57:07Zhttps://recercat.cat/oai/request

oai:recercat.cat:2117/4490652026-02-07T10:16:55Zcom_2072_1033col_2072_452950

Software for simulation and analysis of far-field diffraction patterns in transient grating spectroscopy Goloborodko, Andrii Kotov, Myhailo Serrat Jurado, Carles Universitat Politècnica de Catalunya. Departament de Física Universitat Politècnica de Catalunya. DONLL - Dinàmica no Lineal, Òptica no Lineal i Làsers Transient grating spectroscopy Talbot phenomenon Fresnel diffraction Far-field simulation Spatial frequency analysis Gaussian illumination MATLAB software We present a software package for the simulation and analysis of far-field diffraction patterns in transient grating (TG) spectroscopy. The code is designed to assist both experimental planning and post-processing interpretation by modeling the optical response of TG configurations across a wide range of conditions. It supports input through structured MATLAB variables or Excel-based spreadsheets and provides automated consistency checks and visual output generation. The implementation includes integration over detector pixels, enabling realistic simulations that account for spatial averaging and resolution effects. We demonstrate the software’s capabilities through representative use cases, including the influence of the grating-to-sample distance, the pump-to-probe intensity ratio, and the selection of the division parameter governing pixel integration accuracy. The code is freely available and modular, facilitating its adaptation to different experimental geometries and beam conditions. While full validation is provided elsewhere, this work establishes the core methodology and illustrates the practical value of the tool for TG spectroscopy research. Peer Reviewed Postprint (author's final draft) 2026-03 Article Goloborodko, A.; Kotov, M.; Serrat, C. Software for simulation and analysis of far-field diffraction patterns in transient grating spectroscopy. «Computer physics communications», Març 2026, vol. 320, núm. article 109964. 0010-4655 https://hdl.handle.net/2117/449065 10.1016/j.cpc.2025.109964 eng https://www.sciencedirect.com/science/article/abs/pii/S0010465525004655 info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/PID2023-152154NB-C21/ES/DEMOSTRACION EXPERIMENTAL Y APLICACION DE METODOS DE MEZCLA DE ONDAS EN EL RANGO DE RAYOS X/ http://creativecommons.org/licenses/by-nc-nd/4.0/ Restricted access - publisher's policy Attribution-NonCommercial-NoDerivatives 4.0 International application/pdf