Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Toshitaka Kojima"'
Publikováno v:
IEICE Transactions on Electronics. :48-55
Various kinds of optical near-field apertures have been proposed for higher throughput and smaller spot size. However, few studies have mentioned the readout characteristics of the recorded marks on an optical disk illuminated by a near field optical
Autor:
Takanori Kawai, Toshitaka Kojima
Publikováno v:
IEICE Transactions on Electronics. :1599-1605
In order to realize a higher density version of the conventional optical disk, shorter wavelength laser and narrower track pitch have been put to practical use. However, using narrow track pitch can cause the increase of the crosstalk from the adjace
Publikováno v:
Electronics and Communications in Japan (Part I: Communications). 88:23-32
Publikováno v:
Electronics and Communications in Japan (Part II: Electronics). 84:56-66
Publikováno v:
Electronics and Communications in Japan (Part II: Electronics). 78:94-104
To analyze the light-beam scattering from pit models of optical discs of arbitrary three-dimensional (3-D) shapes, the boundary-element method is formulated in regard to the 3-D pits on perfect conductors. The four divided type of optical signal dete
Autor:
Jun Ido, Toshitaka Kojima
Publikováno v:
Electronics and Communications in Japan (Part II: Electronics). 74:11-20
This paper assumes a simple model for the DRAW (direct-read/after-write) optical disk using a Te-alloy recording medium. The scattering of the light-beam by the pit or boss of arbitrary shape on the boundary of three-layered dielectrics is analyzed b
Publikováno v:
Optical Data Storage.
We treat three-dimensional frequency-dependent FDTD method analysis of the light-beam scattering from a land/groove recording phase-change optical disk model with a metal reflective layer.
Publikováno v:
Scopus-Elsevier
With a genetic algorithm, the structure of adatom clusters is optimized and studied systematically on different metal fcc (111) surfaces modeled by the embedded atom method. It is found that the various lowest-energy structures on the different surfa
Autor:
Toshitaka Kojima
Publikováno v:
Journal of the Optical Society of America A. 7:1740
The diffraction of E-polarized Hermite–Gaussian beams of arbitrary order from a sinusoidal conducting grating is analyzed by using the plane-wave-spectrum representation for the incident beam field and the space harmonic solutions of the diffracted
Autor:
Yoichi Yanagiuchi, Toshitaka Kojima
Publikováno v:
Journal of Applied Physics. 50:41-46
The scattering of a two‐dimensional Gaussian beam wave by a perfectly conducting or dielectric cylinder centered off both the beam axis and the beam waist is treated by the Fourier‐series‐expansion method. The incident‐beam fields are expande