IntechOpen Electromagnetic Field - From Atomic Level to Engineering Applications

The influence of electromagnetic field technology on modern society is profound and extensive. Its applications have expanded into fields such as communications, healthcare, energy, and materials science, significantly propelling the development and progress of modern civilization. This book investigates atoms and molecules, examining within the quantum world how charges and spins manifest new orders and generate novel effects under precisely configured electromagnetic fields. It dissects the underlying physical principles and mathematical formalisms that give rise to these phenomena. Subsequently, it reveals how material response parameters, incorporating these microscopic mechanisms, are integrated into macroscopic electromagnetic equations. This elucidates the complete lifecycle of electromagnetic waves, from generation and control to propagation, and the intrinsic laws governing their interaction with the properties of the medium. Finally, the work focuses on core technical applications in critical domains, including electromagnetic invisibility/cloaking, electromagnetic shielding, electromagnetic compatibility (EMC), electromagnetic medical applications, and electromagnetic propulsion. This transforms the profound physical language hidden within atoms into powerful, precise blueprints for practical engineering. The volume aims to present emerging advances in electromagnetic field technology since the 21st century. By comprehensively addressing novel atomic-scale electromagnetic mechanisms, innovative concepts in electromagnetic functional materials and devices, and engineering applications of electromagnetic technology, this edited format assembles research insights to foster synergistic innovation. This approach accelerates interdisciplinary convergence within relevant fields, creating a powerful impetus for advancing electromagnetic technology to better serve the progress of human society.