1. D. Marcuse, ?Theory of Dielectric Optical Waveguides? (Academic Press, New York, 1974).
2. H. G. Unger,Proc. Eur. Microwave Conf., Brussels,B.51 (1973)
3. A. Yariv, ?Quantum Electronics? (John Wiley, New York, 1975).
4. S. Kawakami andJ. Nishizawa,IEEE Trans. MTT-16 (1968) 814?8.
5. I. Kitano, K. Koizumi, H. Matsumura, T. Uchida andM. Furukawa,J. Japan Soc. Appl. Phys.,39 (1970) 63?70.