Liquid crystal technology is a subject of many advanced areas of science and engineering. This book covers state of the art research and reviews focusing on liquid crystals, their structure and properties. Nowadays, due to this extensive research effort, the conception and fabrication of such photonic structures have gained a complete maturity leading to the realization of the first real applications. This book will be of interest for physicists, chemists, and engineers working in academia or industry, as well as graduate students specializing in liquid crystal technology.