Flat focusing lens designs having minimized reflection based on coordinate transformation techniques
نویسندگان
چکیده
منابع مشابه
Flat-Lens Focusing of Electron Beams in Graphene
Coupling electron beams carrying information into electronic units is fundamental in microelectronics. This requires precision manipulation of electron beams through a coupler with a good focusing ability. In graphene, the focusing of wide electron beams has been successfully demonstrated by a circular p-n junction. However, it is not favorable for information coupling since the focal length is...
متن کاملMagnifying perfect lens and superlens design by coordinate transformation
The coordinate transformation technique is applied to the design of perfect lenses and superlenses. In particular, anisotropic metamaterials that magnify two-dimensional planar images beyond the diffraction limit are designed by the use of oblate spheroidal coordinates. The oblate spheroidal perfect lens or superlens can naturally be used in reverse for lithography of planar subwavelength patte...
متن کاملBroadband focusing flat mirrors based on plasmonic gradient metasurfaces.
We demonstrate that metal-insulator-metal configurations, with the top metal layer consisting of a periodic arrangement of differently sized nanobricks, can be designed to function as broadband focusing flat mirrors. Using 50-nm-high gold nanobricks arranged in a 240-nm-period lattice on the top of a 50-nm-thick layer of silicon dioxide deposited on a continuous 100-nm-thick gold film, we reali...
متن کاملFlat Focusing Mirror
The control of spatial propagation properties of narrow light beams such as divergence, focusing or imaging are main objectives in optics and photonics. In this letter, we propose and demonstrate experimentally a flat focusing mirror, based on an especially designed dielectric structure without any optical axis. More generally, it also enables imaging any light pattern in reflection. The flat f...
متن کاملImage coordinate transformation based on DIV-CURL vector splines
In this paper, we present a vector spline technique for vector field reconstruction. These vector splines are based on an energy minimization functional, which involves the divergence and the rotational fields of the approximated vector. This technique can be used to determine the underlying coordinate transformation in image mapping.
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Optics Express
سال: 2009
ISSN: 1094-4087
DOI: 10.1364/oe.17.007807