Advanced Materials

Cover image for Vol. 27 Issue 20

18_02b/2006Inside Front Cover: Experimental Evidence for Superprism Effects in Three-Dimensional Polymer Photonic Crystals (Adv. Mater. 2/2006)

The inside cover illustrates the highly dispersive propagation of light in a three-dimensional polymer photonic crystal. White light is coupled into a woodpile structure and split into its wavelength components due to the frequency-dependent dispersion properties of the structure. This superprism effect is orders of magnitudes higher than in a conventional glass prism and is caused by the strong anisotropy of the dispersion surface at frequencies slightly above the photonic bandgap. In work reported on p. 221, Serbin and Gu fabricated these woodpile structures operating in the near-infrared wavelength range by means of two-photon polymerization and give theoretical and experimental evidence for the superprism effect in these low-index photonic-crystal structures.

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