1. E. Yablonovitch, Phys. Rev. Lett. 58, 2059 (1987)
2. J.D. Joannopoulos, S.G. Johnson, J.N. Winn, R.D. Meade, Photonic Crystals: Molding the Flow of Light (Princeton University Press, Princeton, 2008)
3. D.W. Prather, S. Shi, A. Sharkawy, J. Murakowshi, G.J. Schneider, Photonic crystals: Theory, Applications and Fabrication (Wiley, New Jersey, 2009)
4. G. Alagappan, P. Wu, Appl. Phys. B 96, 709 (2009)
5. W.H. Southwell, Appl. Opt. 38, 5464 (1999)