Single-mode Anisotropic Cylindrical Dielectric Waveguides
作者:
R.F. Alvarez-Estrada,
M.L. Calvo,
期刊:
Optica Acta: International Journal of Optics
(Taylor Available online 1983)
卷期:
Volume 30,
issue 4
页码: 481-503
ISSN:0030-3909
年代: 1983
DOI:10.1080/713821213
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
We study anisotropic cylindrical dielectric waveguides under the following conditions: (1) their cross section Ω has arbitrary shape; (2) the dielectric permittivity tensor ε has discontinuities at the boundaries, as well as a graded spatial variation; (3) Ω is small, and ε minus the unit 3 × 3 matrix (I) is small and smooth, so that only one pair of propagation modes is allowed. A general and exact dispersion relation for the propagation modes is derived, using integral equation techniques and the long wavelength singularity of the free-space Green's function in two dimensions. We present approximate explicit solutions of the dispersion relation to first order in (ε−I), which exhibit a logarithmic dependence and birefringence, in general. Some numerical estimates are also given. Approximate dispersion relations up to and including second order in (ε −I) are also discussed. The scattering problem is treated briefly.
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