This article is cited in 18 papers

FIBRE OPTICS. OPTICAL FIBRES

Structure of light waves in a waveguide tapered to subwavelength transverse size

T. I. Kuznetsova, V. S. Lebedev

P. N. Lebedev Physical Institute, Russian Academy of Sciences, Moscow

Abstract: The penetration of an H wave through a waveguide whose radius varies continuously from about the wavelength size to subwavelength dimensions (of the order of 1/10 wavelength) is calculated. The method for the field analysis is developed and the range of its applicability is studied by considering some numerical examples. The dependence of the transmission coefficient of a tapered waveguide on the radiation wavelength and on the profile steepness of the waveguide is studied. It is shown that a sharper decrease in the waveguide radius provides higher values of the field transmission coefficients.

PACS: 07.79.Fc, 41.81.Qb, 42.81.Dp

Received: 09.01.2002
Revised: 31.05.2002

 English version: Quantum Electronics, 2002, 32:8, 727–737

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