Photonic devices are electronic components that use light, or photons, to perform various functions. They can manipulate, generate, or detect light, making them essential in applications like telecommunications, imaging, and sensing. Common examples include lasers, light-emitting diodes (LEDs), and photodetectors. These devices rely on the principles of optics and photonics, which study the behavior of light. Photonic devices are crucial for modern technologies, enabling faster data transmission and improved performance in devices such as fiber optic cables and solar cells. Their efficiency and speed make them vital in advancing communication and energy solutions.