Readout contrast beyond diffraction limit by a slab of random nanostructures

Tai Chi Chu*, Din Ping Tsai, Wei Chih Liu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)12-23
Number of pages12
JournalOptics Express
Issue number1
Publication statusPublished - 2007 Jan 8

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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