Accession Number:

ADP012326

Title:

Investigations of Sputtered Silver Oxide Deposits for the SUPER-RENS High Density Optical Data Storage Application

Descriptive Note:

Conference proceedings

Corporate Author:

NATIONAL INST OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY IBARAKI (JAPAN)

Report Date:

2001-04-01

Pagination or Media Count:

6.0

Abstract:

Thin silver oxide films used as mask layers in super-Resolution Nearfield Structure super-RENS disks for high density optical data storage were reactively sputter-deposited and their composition was determined by spectroscopic means. We found that the stoichiometry of the films changed with the oxygen content in the sputtering gas atmosphere. With a stepwise increase in the percentage of O2 from 0 - 100, the corresponding layers consist of Ag, mixtures of Ag and Ag2O, Ag2O, mixtures of Ag2O and AgO and AgO. Laser activation of such oxidic phase containing deposits results in the decomposition of the material and excitation of strong local plasmons in the remaining silver clusters. This was confirmed by acquiring surface enhanced Raman spectra SERS of benzoic acid BA, copper phthalocyanine CP and internal carbon impurities on silver oxide substrates. From this data, we conclude that the sub-wavelength resolution obtained in super-RENS disks is mediated by local surface plasmons on small silver particles forming in the mask layer.

Subject Categories:

  • Properties of Metals and Alloys
  • Optics
  • Solid State Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE