Title :
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
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;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1990. AP-S. Merging Technologies for the 90's. Digest.
Conference_Location :
Dallas, TX, USA
DOI :
10.1109/APS.1990.115414
