Accession Number:

ADP011850

Title:

Polarization Analyses of Readout Signals in Phase Change Material Incorporating a Solid Immersion Lens (SIL)

Descriptive Note:

Corporate Author:

NATIONAL CHIAO TUNG UNIV HSINCHU (TAIWAN) INST OF ELECTRO-OPTICAL ENGINEERING

Personal Author(s):

• Tien, Cungo H.
• Lai, Yin C.
• Shieh, Han P.

Report Date:

2000-01-01

Pagination or Media Count:

8.0

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 xy polarized at different gap widths, at a cost of 0 to 25 percent total intensity reduction.

Descriptors:

• *RECORDING SYSTEMS
• *OPTICAL STORAGE
• *READ OUT TECHNIQUES
• POLARIZATION
• CONTRAST
• DETECTION
• DEGRADATION
• PHASE TRANSFORMATIONS
• THEORY
• INTENSITY
• REDUCTION
• COSTS
• DIFFRACTION
• SIGNALS
• VECTOR ANALYSIS
• IMMERSION
• SOLID BODIES
• LENSES
• NUMERICAL APERTURE

Subject Categories:

• Computer Systems
• Electricity and Magnetism

Distribution Statement:

APPROVED FOR PUBLIC RELEASE