Inside Cover in ANIE

posted Nov 30, 2011, 3:38 PM by Shin-Hyun Kim   [ updated Nov 30, 2011, 3:38 PM ]

Shin-Hyun Kim, Woong Chan Jeong, Hyerim Hwang and Seung-Man Yang, “Robust Chirped Photonic Crystals Created by Controlled Colloidal Diffusion,” Angewandte Chemie International Edition, 50, 11649-11653  (2011).

An on-chip spectrometer has been developed using chirped 3D photonic crystals mounted on a complementary metal-oxide-semiconductor sensor array. In their Communication on page 11 649 ff., S.-H. Kim, S.-M. Yang, and co-workers show that colloidal diffusion in a photocurable medium created gradual variations in the lattice constant of the colloidal crystals. The variations in the lattice constant resulted in a color gradient that spanned the entire visible range.