Open AccessHigh-power generation and transmission in a left-handed planar waveguide excited by an electric dipole
Author(s) -
Qiang Cheng,
Tie Jun Cui
Publication year - 2005
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/opex.13.010230
Subject(s) - optics , waveguide , dipole , planar , excited state , physics , electric field , lossless compression , excitation , permittivity , left handed , materials science , dielectric , optoelectronics , atomic physics , computer graphics (images) , quantum mechanics , data compression , computer science , computer vision
We show that a planar waveguide excited by a three-dimensional linear electric dipole exhibits unusual physical properties if it is filled with two equal-thickness layers, where one layer is air and the other layer is a specialized left-handed material (LHM) with the relative permittivity -1/(1+ delta)+igammaepsilon and permeability -(1+ delta)+i gammamu ( delta, gammaepsilon and gammamu are all small parameters). In such a LHM waveguide, extremely high power densities are generated and transmitted under the excitation of the electric dipole no matter whether the LHM layer is lossless or lossy. We also show that a dominant mode always exists in the waveguide, which is not restricted by the guidance condition and the waveguide geometry. The guidance condition only determines the existence of higher guided modes. Numerical experiments verify the above conclusions.