Optical materials refer to materials that are specifically designed or chosen for their optical properties, such as their ability to transmit, reflect, or refract light. These materials are used in a wide range of applications, including lenses, mirrors, filters, and optical coatings. Researchers in the field of optical materials study the properties of these materials, develop new materials with enhanced optical properties, and explore new applications for these materials in various industries such as telecommunications, imaging, and solar energy. Key areas of research in optical materials include materials with high transparency, low optical losses, and improved optical performance.