Far-field optical response of localized near-field enhancements induced by nano scatters in AgOx super-resolution near-field structure

Tai Chi Chu, Wei Chih Liu, Din Ping Tsai

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The super-resolution near-field structure (super-RENS) is an ultrahigh-density near-field optical disk data storage medium which can achieve superior spatial resolution. Our previous studies found that enhanced local optical intensity occurred at the near field of the super-RENS disk, and the nonlinear near-field optical enhancement is related to the localized surface plasmons of silver clusters dissociated from the AgOx layer of the super-RENS disk. In this paper, we report the near-field and far-field properties of AgOx-type super-RENS with different embedded silver nanoparticles using two-dimensional finite-difference time-domain (FDTD) calculations. Highly localized enhancements are found between adjacent silver nanoparticles in the near fields. The far-field signals of different types silver nano scatters confirm the super-resolution capability of AgO x-type Super-RENS disks. The behaviors of far-field signals indicate the correlation between the enhanced localized surface plasmons and the super-resolution capabilities of AgOx-type super-RENS.

Original languageEnglish
Article number12
Pages (from-to)48-55
Number of pages8
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume5643
DOIs
Publication statusPublished - 2005 Jun 15

Keywords

  • Finite-difference time-domain method
  • Localized surface plasmon
  • Metallic nanoparticles
  • Near-field optical storage
  • Optical disks
  • Super-resolution near-field structure

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

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