Spatial photonic crystals

Spatial photonic crystals are materials engineered with a periodic structure at the scale of light wavelengths, creating a repeating pattern that affects how photons travel through them. This pattern influences the movement of light, allowing certain wavelengths to be blocked or guided in specific ways. Think of them as optical "barriers" that control light similarly to how a crystal lattice affects electrons in a solid. They are used in advanced technologies like efficient lasers, optical fibers, and sensors, enabling precise manipulation of light for various applications.