Imaging by a double negative metamaterial slab excited with an arbitrarily oriented dipole
Article first published online: 31 JAN 2014
©2014. American Geophysical Union. All Rights Reserved.
Volume 49, Issue 1, pages 68–79, January 2014
How to Cite
2014), Imaging by a double negative metamaterial slab excited with an arbitrarily oriented dipole, Radio Sci., 49, 68–79, doi:10.1002/2013RS005242., , and (
- Issue published online: 17 MAR 2014
- Article first published online: 31 JAN 2014
- Accepted manuscript online: 7 JAN 2014 08:31AM EST
- Manuscript Accepted: 2 JAN 2014
- Manuscript Revised: 5 NOV 2013
- Manuscript Received: 10 JUN 2013
- dyadic Green's function
The imaging capability of nonideal double negative metamaterial slabs excited by arbitrarily oriented electric or magnetic dipoles is investigated. A dipole oriented parallel to the interface of the slab excites transverse electric and transverse magnetic modes simultaneously, which are transmitted unequally by the slab if either the slab's relative permittivity (εr) or permeability (μr) or both are perturbed from the ideal case, i.e., εr=μr=−1 for a slab in vacuum. Approximations in the electrostatic limit, valid for modes with large wave numbers, fail to predict this phenomenon, and more accurate analysis of the field distribution in the vicinity of the image plane behind a nonideal slab becomes important. By expressing the fields in terms of a one‒dimensional Hankel transform in the spectral domain and using an adaptive Gauss‒Kronrod quadrature, a tool for evaluating the spatial field intensity in the vicinity of the image plane behind the slab is developed. The calculated field intensities reveal that a double negative slab does not focus in the three‒dimensional space and is only capable of two‒dimensional imaging.