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Proceedings Paper

Three-dimensional FDTD analysis of optical disk storage system
Author(s): Jingfeng Liu; Bao Xi Xu; Tow Chong Chong
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Paper Abstract

With the development of high density optical disk storage, the characteristic size of the interaction object is comparable to the wavelength of the light which is used to read/write the disk. In this resonance region, the conventional scalar diffraction theory can not be applied to analyze the system anymore. Vector diffraction theories have been proposed to address this problem: thin film theory for treatment of the multilayer structure of flat surface, rigorous grating theory for treatment of the pre-grooved multilayer coated disk, finite methods for treatment of the pre-grooved multilayer coated disk with the presence of irregular data marks. Among the various finite methods, finite-difference time-domain (FDTD) method can treat the complex disk structure and is relatively easy to implement.5,6* But when treating focusing problem, the incident focusing beam was approximated as Gaussian plane beam previously. This is not the case in high NA optical storage system. In this paper, we propose a three dimensional FDTD method which can be used to analyze the high NA optical disk storage system.

Paper Details

Date Published: 28 June 1999
PDF: 3 pages
Proc. SPIE 3864, Joint International Symposium on Optical Memory and Optical Data Storage 1999, 38642I (28 June 1999); doi: 10.1117/12.997654
Show Author Affiliations
Jingfeng Liu, National Univ. of Singapore (Singapore)
Bao Xi Xu, National Univ. of Singapore (Singapore)
Tow Chong Chong, National Univ. of Singapore (Singapore)


Published in SPIE Proceedings Vol. 3864:
Joint International Symposium on Optical Memory and Optical Data Storage 1999
Shigeo R. Kubota; Ryuichi Katayama; Douglas G. Stinson, Editor(s)

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