Evanescent coupling in magneto-optical and phase-change disk systems based on the solid immersion lens (SIL)

Wei Hung Yeh, M. Mansuripur

Research output: Contribution to journalConference article

2 Scopus citations


The impact of evanescent coupling on the throughput of the recording process and the resolution of the readout signal in SIL-based systems is presented. The loss of the MO signal due to a wide gap-width may be attributed to the reduction of magneto-optical activity, the rise in reflectance, and the variation of the relative phase between the two components of polarization over the cross-section of the reflected beam. For PC disks, the reduced reflectivity-difference between the crystalline and amorphous states, and the rise in reflectance are responsible for the reduction of readout signal with the increasing gap-width.

Original languageEnglish (US)
Pages (from-to)358-360
Number of pages3
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - Dec 1 1999
EventProceedings of the 1999 Joint International Symposium on Optical Memory and Optical Optical Data Storage (ISOM/ODS'99) - Koloa, HI, USA
Duration: Jul 12 1999Jul 15 1999


ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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