The recent development of photonic crystals has opened up a world of possibilities for optics research. These crystals are made up of a lattice of tiny holes that are arranged in a precise pattern, allowing researchers to control the speed and direction of light. This breakthrough has enabled researchers to create optical components which can be used to manipulate light in ways never before possible. These components can be used to create devices such as waveguides, lenses, and optical switches, which can be used to advance the field of optics.

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source: Phys.org