Photonic bandgap materials are the photonic analogs of the semi-conductors and have important practical applications. Controlling the fundamental properties of light has become possible thanks to the photonic bandgap which these novel materials possess. This book focuses on the study of the three-dimensional photonic bandgap. The reader will follow the path that started with the rapid progress made on the theoretical front shortly after the introduction of the concept in 1987, progress that led to... Mehr