1. J.D. Joannopoulos, R.D. Meade, J.N. Winn, Photonic Crystals: Molding the Flow of Light (Princeton University Press, Princeton, 1995).
2. K. Sakoda, Optical Properties of Photonic Crystals (Springer Verlag, Berlin, 2001).
3. D. Dunmur, K. Toriyama, in Physical Properties of Liquid Crystals, edited by D. Demus, J. Goodby, G.W. Gray, H.-W. Spiess, V. Vill (Wiley-VCH, Weinheim, 1999) pp. 124-128.
4. For a review, I. Dierking, Adv. Mater. 12, 167 (2000).
5. a) D.-K. Yang, L.-C. Chien, Y.K. Fung