期刊
OPTICS COMMUNICATIONS
卷 280, 期 1, 页码 120-125出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optcom.2007.08.025
关键词
active medium; negative refraction; time-domain analysis; frequency-domain analysis
类别
The refractive index of a dielectric medium comprising both passive and inverted components in its permittivity was determined using two methods: (i) in the time-domain, a finite-difference algorithm to compute the frequency-domain reflectance from reflection data for a pulsed plane wave that is normally incident on a dielectric half-space and (ii) in the frequency-domain, the deflection of an obliquely incident Gaussian beam on transmission through a dielectric slab. The dielectric medium was found to be an active medium with a negative real part for its refractive index. Thereby, a recent controversy in the scientific literature was resolved. (c) 2007 Elsevier B.V. All rights reserved.
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