All analysis of the beam-wave scattering from arbitrarily shaped pits at a three-layered dielectric interface by the boundary-element method

Author

Kojima, T. ; Ido, J.

Author_Institution

Osaka Electro-Commun. Univ., Neyagawa, Japan

fYear

1990

fDate

7-11 May 1990

Firstpage

1556

Abstract

Simple models of direct-read-after-write (DRAW) type optical disks using tellurium as a recording material are analyzed. Specifically, a BEM (boundary element method) analysis of the scattering of a light beam from arbitrarily shaped pits or bosses at the interface of a three-layered dielectric medium is presented. In addition, the characteristics of the sum and the differential signal output by all assumed split detector are discussed. Numerical results indicate that the V-shaped pregroove shows a better signal-output characteristic than the rectangular one for the E-polarized case.<>

Keywords

boundary-elements methods; light scattering; optical disc storage; DRAW optical disks; E-polarized case; Te; V-shaped pregroove; arbitrarily shaped pits; beam-wave scattering; bosses; boundary-element method; direct-read-after-write; models; signal-output characteristic; three-layered dielectric interface; Dielectric materials; Disk recording; Integral equations; Light scattering; Magnetic analysis; Magnetic recording; Optical materials; Optical recording; Optical scattering; Tellurium;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium, 1990. AP-S. Merging Technologies for the 90's. Digest.

Conference_Location

Dallas, TX, USA

Type

conf

DOI

10.1109/APS.1990.115414

Filename

115414