This zip archive contains the data measured and the software developed for the paper Kurochkin, O.; Murugesan, Y. K.; Bennett, T.; D'Alessandro, G.; Reznikov, Y.; Tang, B.; Mehl, G. H. & Kaczmarek, M. Thermal optical non-linearity of nematic mesophase enhanced by gold nanoparticles - an experimental and numerical investigation Phys. Chem. Chem. Phys., The Royal Society of Chemistry, 2016 DOI: 10.1039/C6CP00116E The zip archive contains two folders: The "Experimental data" folder contains the experimental data (and some fits) in Excel xlsx format and as clickable pptx and docx documents. The file names contain the figure number where the data is plotted in the paper. The "Numerical data" folder contains all the Matlab codes that have been used to produce the numerical figures in the paper. Each script has name FigX.m where X refers to the figure number. For example, figure 8 of the paper can be reproduced by running the code Fig8.m. All the other Matlab codes in this folder are service functions that are called by the FigX scripts. The software is licensed under the MIT license: https://opensource.org/licenses/MIT Giampaolo D'Alessandro Southampton 3rd March 2016 Email: dales@soton.ac.uk