Subwavelength fractional Talbot effect in layered heterostructures of composite metamaterials.
We demonstrate that under certain conditions, fractional Talbot revivals can occur in heterostructures of composite metamaterials, such as multilayer positive- and negative-index media, metallodielectric stacks, and one-dimensional dielectric photonic crystals. Without recourse to the paraxial approximation, we also obtain Talbot images for the feature sizes of transverse patterns smaller than the illumination wavelength. A general expression for the Talbot distance in such structures is derived, and the conditions favorable for observing Talbot effects in layered heterostructures are discussed.
Feng
Simin
S
Physics and Computational Sciences, Naval Air Warfare Center, China Lake, California 93555, USA.
Halterman
Klaus
K
Overfelt
Pamela L
PL