Planned intervention: On Thursday March 28th 07:00 UTC Zenodo will be unavailable for up to 5 minutes to perform a database upgrade.
Published August 17, 2007 | Version v1
Journal article Open

Radiationless Electromagnetic Interference: Evanescent-Field Lenses and Perfect Focusing

Creators

Description

Diffraction restricts the ability of most electromagnetic devices to image or selectively target objects smaller than the wavelength. We describe planar subwavelength structures capable of focusing well beyond the diffraction limit, operating at arbitrary frequencies. The structure design, related to that of Fresnel plates, forces the input field to converge to a spot on the focal plane. However, unlike the diffraction-limited zone plates, for which focusing results from the interference of traveling waves, the subwavelength plates control the near field and, as such, their superlensing properties originate from a static form of interference. Practical implementations of these plates hold promise for near-field data storage, noncontact sensing, imaging, and nanolithography applications.

Files

article.pdf

Files (4.8 MB)

Name Size Download all
md5:8858bff98012ba1c8b95f535ff3f368a
4.8 MB Preview Download