Title :
Whispering-gallery rays within dielectric circles and spheres
Author :
Snyder, A.W. ; Mitchell, D.J.
Author_Institution :
Australian National University, Institute of Advanced Studies, Department of Applied Mathematics, Canberra, Australia
Abstract :
The attenuation of rays propagating at nearly grazing incidence within lossless dielectric circles and spheres is given. There are no trapped rays, no matter how great the refractive index of the structure; however, many rays are only very weakly attenuated. These are the `leaky rays¿ that are predicted, incorrectly, by Fresnel´s laws to be trapped.
Keywords :
electromagnetic wave absorption; guided electromagnetic wave propagation; EM wave attenuation; Fresnel´s laws; dielectric circles; dielectric spheres; leaky rays; whispering gallery rays;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19740011
