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Imaging of optical disc using reflection-mode scattering-type scanning near-field optical microscopy.

Authors
Type
Published Article
Journal
Journal of microscopy
Publication Date
Volume
194
Issue
Pt 2-3
Pages
552–557
Identifiers
PMID: 11388305
Source
Medline

Abstract

A phase-change optical disc was observed using a reflection-mode scattering-type scanning near-field optical microscope (RS-SNOM). In an a.c.-mode SNOM image, the 1.2 microm x 0.6 microm recording marks were successfully observed although the data were recorded on the groove. In contrast, no recording marks could be resolved in a d.c.-mode SNOM image. These results are in good agreement with those from a numerical simulation using the finite difference time domain method. The resolution was better than 100 nm with a.c.-mode SNOM operation and the results indicate that recording marks in phase-change optical media can be directly observed with the RS-SNOM.

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