Explore the impact of nanostructured materials on the Casimir-Lifshitz force in this 43-minute conference talk by Victoria Esteso Carrizo from the University of Seville. Delve into the optical response of multilayer nanostructures, examining thinner layers, power absorption, and spatial homogeneity. Learn about the Monte Carlo method and first approximation techniques used in studying these phenomena. Investigate interference effects and the spatial distribution of absorption in nanostructured materials. Gain insights from the discussion on quantum and thermal electrodynamic fluctuations in the presence of matter, presented as part of the "Quantum and Thermal Electrodynamic Fluctuations in the Presence of Matter: Progress and Challenges" conference at the Kavli Institute for Theoretical Physics.