Photonic Crystals: Principles, Bandgaps, and Applications

Controlling the flow of light is key to the next generation of optical communication, sensing, and computing. This text-based guide introduces you to the physics and engineering of photonic crystals, which serve as the optical analogues of semiconductors. You will develop a solid conceptual foundation in how periodic dielectric structures manipulate photons. By studying the underlying electromagnetic theory, you will understand how to design and analyze photonic bandgaps for real-world optical devices. What you'll learn: Understand the fundamental physics of light propagation in periodic media; Analyze one-dimensional, two-dimensional, and three-dimensional photonic crystal structures; Calculate and interpret photonic bandgaps and dispersion relations; Explore key applications including photonic crystal fibers, waveguides, and optical microcavities; Examine modern developments such as silicon photonics integration and topological photonic concepts. The course begins with core electromagnetic theory and Maxwell's equations in periodic media before moving systematically through different dimensional structures and their practical engineering applications. This course is designed for undergraduate students, researchers, and engineers new to optics and photonics, requiring only a basic background in introductory electromagnetism. Start reading today to unlock the potential of light-based technologies.