I have designed an optical structure using FDTD, I want to measure its effective refractive index which should be negative like metamaterials. How could I measure the negative effective refractive index in FDTD. Please help me for this.
In Lumerical’s knowledge base there are details about your topic. Please star from this page https://kb.lumerical.com/en/index.html?metamaterials_s_parameters.html . You will need the information in order to continue to the following page https://kb.lumerical.com/en/index.html?metamaterials_effective_parameters_smith.html . In the last page you will learn how to calculate the effective refractive index and related properties for your optical structure.