Abstract
Material loss diminishes the ability of a negative refractive index material to
function as a superresolution lens. We find that the transmittance of a negative
index slab can be greatly enhanced at a certain evanescent field spatial
frequency if the imaginary parts of the permittivity and permeability in the
slab can be tuned, even when the object, lens, and image domains have overall
loss. This leads to a proposed method to image the far-subwavelength features of
an object by reconstructing the evanescent part of its spectrum.
© 2016 Optical Society of America
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