What are the properties of Bragg wavelength in photonic crystals?

In photonic crystals, the Bragg wavelength refers to the characteristic wavelength of light that is reflected by the periodic structure of the crystal. This wavelength is determined by the spacing and refractive index of the crystal's constituent materials, and can be controlled by adjusting these parameters. The Bragg wavelength plays a crucial role in the behavior of photonic crystals, as it dictates the band gaps and resonant modes that can occur within the crystal structure. By tuning the Bragg wavelength, researchers can manipulate the light-matter interactions and design novel optical devices with tailored properties and functionalities.

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