1. See, for example, Marshall, L., and Kra, G., Optics and Photonics News, (March 2002)
2. Johnson, S. G., and Joannopoulos, J. D., (2002) Photonic Crystals: The Road from Theory to Practice, Kluwer, Boston
3. Lin, S.-Y., et al., Opt. Lett. (2001) 26, 1903
4. Lin, S.-Y., et al., Science (1998) 282, 274
5. Bayer, M., et al., Phys. Rev. (1998) Lett. 81, 2582