Optical surface waves along a toroidal metallic guide
作者:
M. E. Marhic,
L. I. Kwan,
M. Epstein,
期刊:
Applied Physics Letters
(AIP Available online 1978)
卷期:
Volume 33,
issue 7
页码: 609-611
ISSN:0003-6951
年代: 1978
DOI:10.1063/1.90478
出版商: AIP
数据来源: AIP
摘要:
An approximate analysis shows that rays guided inside a torus oscillate sinusoidally around the equator. Expressing the Helmholtz equation in toroidal coordinates yields the equivalent index of refraction. The equation can be solved, yielding Airy functions in the direction perpendicular to the surface. Along the surface the equation is similar to that for media with a quadratic index profile, the Hermite‐Gaussian solutions of which follow sinusoidal trajectories while oscillating in width. Experimental verification of these features is presented.
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