Development of Organic Recording Media for Blue High Numerical Aperture Optical Disc System

Abstract

A new ASE filter is presented, consisting of 20 dispersion prisms and two spatial filters. The transmission of the filter is measured with a ring-dye laser. The 1‰ width of the filter is 0.23 nm. The transmission is approximately 80% for the transmitted wavelengths. The rejection is in the order of 10 −5 . The transmission profile is calculated from the index of refraction of the prisms, Snell's law, and the laser waist diameter. The calculated profile fits the measured profile very well.

Spectroscopic, thermal, and recording properties of metal(II)-azo complexes for blu-ray recording materials

“…Most of these media were inorganic phase change materials as recording layer. However, since organic dyes, especially metal(ΙΙ)-azo complexes are with modifiable molecular structures, low cost, and easy fabrication, they have attracted much attention [1][2][3][4][5] . As is known, in order to achieve a better storage medium, the following factors should be * yqwu@siom.ac.cn; phone +86-21-69918087; Fax: +86-21-69918562.…”

Blue Violet Laser Write-Once Optical Disk With Coumarin Derivative Recording Layer

“…Since the capacity of CD-R or DVD-R is not enough for high-definition moving pictures to be recorded in high quality, it has been recognized that a time has come for the "high density digital versatile disk-recordable (HD DVD-R)" disk system to appear. One of high density optical storage technologies makes use of a 405 nm blue-violet laser and an objective lens with numerical aperture (NA) of 0.65/0.85 [1]. Most of these media were inorganic phase change materials as recording layer.…”

Synthesis of nickel(II) complexes of α-isoxazolylazo-β-diketones and their absorption of spin-coating films and thermal properties for HD-DVD-R

“…The absorption properties and thermal stability of these complexes were discussed. The static optical recording test for high density digital versatile disc-recordable (HD-DVD-R) system was also studied.High density optical storage technology which uses a 405 nm blue-violet laser and an objective lens of high numerical aperture (NA) of 0.85 is developing rapidly due to its high optical disc capacity over 23 GB on a single layer of a 120 mm diameter disc and great interest on commercial demand [1,2]. Virtually all the factors that may improve the technology have received much attention [3][4][5][6].…”