# Nanopinholes-Based Optical Superlens

Authors: Yongqi Fu; Chunlei Du; Wei Zhou; Lennie Enk Ng Lim
Journal: Research Letters in Physics
 (2008)

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## Abstract

A type of nanopinhole-based plasmonic structure is presented. It can realize superfocusing within
micron-scale propagation distance with spatial resolution beyond diffraction limit. Cut-off wavelength effect is highlighted for understanding how periodicity distribution of the nanopinholes influences transmission and focusing through the structure.
Redshift peak transmission occurs while the periodicity increases. In addition, focusing property of the plasmonic structures is analyzed for the monochromatic illumination with different incident wavelengths ranging from
400 nm to 750 nm. The easy fabrication and high focusing performance of the proposed structures
may be used in data storage devices,
bioimaging, and nanolithography.


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## Body


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*Source: 148505-2008-02-13.xml*