👉 Laser disks are a type of semiconductor disk that is used in lasers. They consist of a thin, thin film of metal or other semiconductor material sandwiched between two glass or plastic insulators. The metal layer acts as an absorber, while the insulator serves as a reflector to focus light onto its intended target. Laser disks are highly efficient at focusing and guiding laser beams, making them ideal for use in laser diodes, lasers, and other applications where high efficiency is required.