Nanophotonics: Tailoring Light-Matter Interaction at the Nanoscale

Abstract

Nanophotonics, the study of light-matter interaction on the nanometer scale, has revolutionized modern photonic and optoelectronic technologies. By manipulating light at dimensions smaller than the wavelength, nanophotonics enables unprecedented control over optical fields through engineered nanostructures such as plasmonic nanoparticles, photonic crystals, and metasurfaces. These capabilities have led to breakthroughs in biosensing, photovoltaics, quantum communication, and integrated photonics. This article provides an in-depth exploration of the mechanisms, materials, and architectures that drive nanophotonics, with emphasis on their role in enhancing light confinement, scattering, and energy transfer. Current challenges, such as material losses and integration with CMOS technologies, are discussed along with emerging trends, including quantum nanophotonics and topological photonic states.