Polarization analyses of readout signals in phase change material incorporating a Solid Immersion Lens (SIL)

Chung-Hao Tien*, Yin-Chieh Lai, Han Ping D. Shieh

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

Abstract

Comprehensive analyses based on rigorous vector diffraction theory have been presented to simulate the readout signal contrast using SIL in reading phase change recording disk. De-polarized reflected light (y-polarized from x-polarized incident beam) results in the reduction of total signal contrast, and becomes more obvious for high numerical aperture (NA) systems. Due to the signal degradation from de-polarized reflected light, filtering de-polarized light is applied to signal detection. The x-polarized contrast is a factor 1.0 to 1.35 higher than the conventional detection contrast (x+y polarized) at different gap widths, at a cost of 0 to 25 percent total intensity reduction.

Original languageEnglish
Pages (from-to)155-162
Number of pages8
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume4081
DOIs
StatePublished - 2000
EventOptical Storage and Optical Information Processing - Taipei, Taiwan
Duration: 26 Jul 200027 Jul 2000

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