Open AccessReadout contrast beyond diffraction limit by a slab of random nanostructures
Author(s) -
Tsuchin Philip Chu,
Din Ping Tsai,
Wei Chih Liu
Publication year - 2007
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.15.000012
Subject(s) - optics , nanostructure , diffraction , fourier transform , fourier optics , physics , ptychography , field (mathematics) , physical optics , limit (mathematics) , materials science , nanotechnology , mathematics , mathematical analysis , quantum mechanics , pure mathematics
A simplified Fourier optics approach is applied to study how near-field optical disks retrieve evanescent signals through random nanostructure. The statistical properties of the random nanostructures are used to realize the general behavior of near-field optical disks. The mechanism of its super-resolution capability and an analytical expression of the readout contrast of near-field optical disks with random apertures are derived. The resolution of near-field optical disk is determined by the size of the random nanostructure.