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28 June 1999 Three-dimensional FDTD analysis of optical disk storage system
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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.
© (1999) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jingfeng Liu, Bao Xi Xu, and Tow Chong Chong "Three-dimensional FDTD analysis of optical disk storage system", Proc. SPIE 3864, Joint International Symposium on Optical Memory and Optical Data Storage 1999, 38642I (28 June 1999);

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