Metamaterials Evolution

This lecture explores the evolution of metamaterials from the microwave regime to the optical regime, discussing attempts to build metamaterials at optical frequencies using concepts developed for microwaves. The instructor showcases various structures, such as split ring resonators, and explains the challenges faced in miniaturization and achieving true 3D materials. The lecture highlights the progress made in scaling down metamaterials and the saturation of advancements due to losses in metals as optical frequencies are approached.