title: Poynting vector analysis of a superlens.
abstract: A power analysis of the lossy negative refractive index or left-handed slab lens is described. The presence of vortices in the image plane is revealed with small loss or gain, and these are attributed to the influence of field growth in the evanescent spectrum.
authors.affiliation: School of Electrical and Computer Engineering, Purdue University, 465 Northwestern Avenue, West Lafayette, Indiana 47907-2035, USA.
authors.forename: Ming-Chuan
authors.initials: MC
authors.lastname: Yang
authors.forename: Kevin J
authors.initials: KJ
authors.lastname: Webb