Directed energy weapons is an academic and engineering research field focused on the principles, design, development, and application of systems that project highly concentrated electromagnetic energy (such as lasers or microwaves), particle beams, or sonic energy onto a target to produce disruptive, damaging, or destructive effects. This domain investigates the physics of energy generation, beam propagation and control, target interaction phenomenology, system integration challenges, and operational methodologies, distinguishing itself by the directed, often non-kinetic, nature of energy delivery and its significance in advancing defense and security technologies.