1. J.D. Joannoupoulos, R.B. Meade, and J.N. Winn, Photonic Crystals: Molding the Flow of Light ( Princeton University Press, Princeton NJ 1995 )
2. J.G. Fleming and S.-Y. Lin: Opt. Lett. 24, 49 (1999)
3. See, e.g., K. Busch and S. John: Phys. Rev. Lett. 83, 967 (1999), and discussions therein
4. V. Berger: Phys. Rev. Lett. 81, 4136 (1998); and also the recent experiment: N.G.R. Broderick, G.W. Ross, H.L. Offerhaus, D.J. Richardson, and D.C. Hanna: Phys. Rev. Lett. 84, 4345 (2000); S. Saltiel and Y.S. Kivshar: Opt. Lett. 25, 1204 (2000)
5. S.F. Mingaleev and Yu.S. Kivshar, Opt. Photon. News 13, No. 7, 48 (2002)