2) cf., J. Joannopoulos, R. Meade, and J. Winn : Photonic Crystals (Princeton University Press, Princeton, NJ, 1995).
3) cf., Abstracts of Workshop on Electromagnetic Crystal Structures, Design, Synthesis, and Applications (WECS) (Laguna Beach, California, Jan., 1999).
4) K. Matsumoto, S. Sasaki, K. Haraga, K. Yamaguchi, T. Fujii, I. Okamoto, T. Kimura, and I. Fujii : J. Appl. Phys., 73, 339 (1993).