Photonic Crystals details recent progress in the study of photonic crystals, ranging from fundamental aspects to up-to-date applications, in one unified treatment. It covers most of the worldwide frontier fields in photonic crystals, including up-to-date fabrication techniques, recent and future technological applications, and our basic understanding of the various optical properties of photonic crystals. Brand-new theoretical and experimental data are also presented. The book is intended for graduate course students and specialists actively working in this field, but it will also be useful for newcomers, especially the extensive chapter dealing with fundamental aspects of photonic crystals, which paves the way to a full appreciation of the other topics addressed.