Structural Study of Photonic Crystal as Superprism

The superprism behavior of Photonic Crystal (PC) due to different geometrical shapes, e.g., circular, hexagonal and square of air holes arranged in triangular lattice has been studied. Structures rely on phase velocity sensitivity in a 2D photonic crystal slab to observe and compare the angular magnification in the uniform medium outside the PC. The observation of superprism behavior has been made using angle sensitive and wavelength sensitive propagation of light. It has been found that the PC with hexagonal rod geometry yields the best behavior. Results revealed that a small input beam, with a width of the order of wavelengths, can be used for beam steering, which would allow a subcompact-sized superprism device.