Polarization analyses of readout signals by a solid immersion lens in phase change recording material

Chung-Hao Tien*, Yin-Chieh Lai, H. P.D. Shieh

*Corresponding author for this work

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

Comprehensive analyses based on the rigorous vector diffraction theory were used to simulate the polarized readout signals using a solid immersion lens (SIL) in reading phase change (PC) disks. For an x-polarized incident beam, the signal contrast in x and y polarization was a different function of air gap between the bottom surface of the SIL and recording medium. Compared with conventional nonpolarized detection schemes for PC media, the x-polarized contrast is a factor 1.0 to 1.35 higher at different air gaps, at a small cost of total intensity loss.

Original languageEnglish
Pages (from-to)2285-2292
Number of pages8
JournalOptical Engineering
Volume40
Issue number10
DOIs
StatePublished - 1 Oct 2001

Keywords

  • Near-field recording
  • Numerical aperture
  • Polarization
  • Solid immersion lens (SIL)
  • Vector diffraction

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