Trapped rainbow effect in visible light left-handed heterostructures
We experimentally demonstrate the trapped rainbow in tapered left-handed heterostructures (LHHs) at visible frequencies. The employed left-handed metamaterials (LHMs) are isotropic with the size of hu...
We experimentally demonstrate the trapped rainbow in tapered left-handed heterostructures (LHHs) at visible frequencies. The employed left-handed metamaterials (LHMs) are isotropic with the size of hu...
A ring artifact suppression algorithm based on a priori information
In this letter, ring artifacts in two-dimensional (2D) tomographic slices are considered. For a parallel beam geometry we propose an interactive algorithm, which removes the artifacts while preserving...
In this letter, ring artifacts in two-dimensional (2D) tomographic slices are considered. For a parallel beam geometry we propose an interactive algorithm, which removes the artifacts while preserving...
Planar metallic nanoscale slit lenses for angle compensation
Appl. Phys. Lett. 95, 071112 (2009); doi:10.1063/1.3211875
Published 21 August 2009
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We demonstrate numerically, using a modified total-field/scattered-field formalism, that metallic lenses, based on arrays of nanoscale slits with varying widths in a planar metallic film, can be used to focus light and compensate for various angles of incidence. These structures could be used as integrated microlenses to improve the efficiency of pixels in solid-state image sensors. Our design guidelines simultaneously accomplish a prism and focusing action. Our results also indicate the importance of the aperture effect for such far-field focusing devices.
©2009 American Institute of Physics
| History: | Received 27 April 2009; accepted 30 July 2009; published 21 August 2009 |
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http://link.aip.org/link/?APPLAB/95/071112/1 |
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