Light-matter interaction is a broad research area in physics and materials science that explores the interactions between electromagnetic radiation (such as light) and matter. This includes studying how light interacts with atomic and molecular structures, how it can be absorbed, emitted, scattered, or refracted by different materials, and how these interactions can be manipulated for various applications in areas such as optics, photonics, and quantum mechanics. Understanding light-matter interaction is crucial for developing technologies such as lasers, solar cells, sensors, and quantum computing devices. Researchers in this field use a combination of theoretical models, experimental techniques, and computational simulations to study and control the behavior of light and matter at the nanoscale and beyond.