Reuven Gordon. Limits for superfocusing with finite evanescent wave amplification
Submitted on: Mar 17, 2012, 13:42:41
Natural Sciences / Physics / Optics
Description: Perfect lensing using negative refractive index materials and radiationless electromagnetic interference both provide extreme subwavelength focusing by amplifying evanescent wave components that are usually lost. This paper provides a relation between the achievable focus spot size, the amplification available and the focal length. This may be considered as a revised version of Abbe's diffraction limit for focusing systems that have evanescent wave amplification. It is useful in comparing the amplification achieved in various subwavelength focusing implementations, as well as determining when it is better to use existing near-field techniques, such as simple diffraction from an aperture or slit, than to attempt complicated superfocusing.
The abstract of this article has been published in the "Intellectual Archive Bulletin" , March 2012, ISSN 1929-1329.
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