A photonic device is a technology that uses light (photons) to perform various functions, such as communication, sensing, and imaging. These devices can manipulate light in different ways, including generating, detecting, or controlling it. Common examples include lasers, optical fibers, and light-emitting diodes (LEDs). Photonic devices are essential in modern technology, enabling high-speed data transmission in telecommunications and enhancing medical imaging techniques. They play a crucial role in fields like quantum computing, biomedical engineering, and information technology, contributing to advancements in both consumer electronics and industrial applications.