Two-dimensional finite-difference time-domain simulation for rewritable optical disk surface structure design

Justin B. Judkins, Charles W. Haggans, Richard W. Ziolkowski

Research output: Contribution to journalArticle

29 Scopus citations

Abstract

A novel two-dimensional finite-difference time-domain simulation for treating the interaction of a focused beam with a rewritable optical disk is detailed and experimentally validated. In this simulation, the real material properties of the rewritable multilayer stack and the aperiodic nature of the disk topography are considered. Excellent agreement is obtained between calculated and measured push–pull tracking servosignals for magneto-optical disks with pregrooves and infinitelength preformat pits. To demonstrate the utility of the simulation as a design tool, the design process for a 0.9-ìm track pitch, continuous, composite servoformat magneto-optical disk is given.

Original languageEnglish (US)
Pages (from-to)2477-2487
Number of pages11
JournalApplied optics
Volume35
Issue number14
DOIs
StatePublished - May 10 1996

Keywords

  • Compact disk
  • Finite-difference time domain
  • Focused beams
  • Gratings
  • Multilayer
  • Optical disk
  • Push–pull
  • Tracking signals

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering

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