New usage of photo-discolor diarylethene compound

A photochromic and diarylene technology, applied in the application field of photochromic diarylene compounds in near-field super-resolution optical storage, can solve the problem of poor light transmittance, high melting threshold, and poor light transmittance of masks And other problems, to achieve good compatibility, broad application prospects, reduce the effect of laser power

Inactive Publication Date: 2008-10-22
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These mask layer materials are mostly inorganic materials, with high melting threshold and poor light transmission. The prepared optical disc needs to be written and read with a high-power laser, which increases the difficulty of preparing lasers, and the mask is poor. Light transmittance leads to a lower signal-to-noise ratio, which directly affects the readout effect

Method used

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  • New usage of photo-discolor diarylethene compound
  • New usage of photo-discolor diarylethene compound
  • New usage of photo-discolor diarylethene compound

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Example 1. Preparation of near-field super-resolution optical storage discs by perfluorodiarylene

[0057] Dissolve 16 mg of perfluorocyclopentene diarylene compound 1a (see formula below) in 1 ml of chloroform, then add 80 mg of solid PMMA, and put it into an ultrasonic oscillator for 10 minutes to ensure that all solid substances are dissolved. Use a syringe to absorb the above-mentioned liquid quantitatively, drop it on the PC disc, spin coat a layer of uniform film on the substrate with a thickness of 250nm by spin coating, and use this film as a mask layer. In the same way, it is coated with a film with a thickness of 200nm. In this film, perfluorodiarylene 1b (see the following formula) is used as the recording layer material, and the polymer used is still PMMA. As the recording layer, the obtained Near-field super-resolution optical storage disc.

[0058]

[0059]As a contrast, a film with a thickness of 200nm was directly coated on the PC disc (in this film,...

Embodiment 2

[0062] Example 2. Preparation of near-field super-resolution optical storage discs by perfluorodiarylene

[0063] Using the same method as in Example 1 to make a mask layer on the glass disk, and then use the thermally deformable material heptyloxycopper phthalocyanine as the recording layer material to make a recording layer to obtain a near-field super-resolution optical storage CD.

[0064] As a control, a recording layer was directly prepared on a glass disc by using the thermally deformable material heptyloxycopper phthalocyanine as the recording layer material to obtain a control disc.

[0065] Place the disc under a fixed laser (λ=690nm, spot diameter 1.6μm), move the sample at a constant speed, and obtain a linear recording spot, and the width of the spot is the recording line width. The recording results on the control disk and the near-field super-resolution optical storage disk are observed under the scanning electron microscope as follows: Figure 3A and Figure...

Embodiment 3

[0066] Example 3. Comparison experiment of optical disk near-field optical storage using heteroatom cyclopentene diarylene as mask layer material

[0067] In the heteroatom cyclopentene-type diarylene molecules, as an example, the 2a molecule (see the following formula) is used as the mask layer material, and the 1b molecule is used as the recording layer material. The same method as in Example 1 is used to prepare a heteroatom-containing A disk with a cyclopentene-type diarylene mask and a disk without a mask were used for storage comparison experiments. The results obtained are as follows Figure 4A and Figure 4B shown.

[0068]

[0069] The results show that when there is no mask, the recording size of the line spot is 1.7 μm. After adding the heteroatom cyclopentene diarylene mask, the storage size becomes 1.2 μm. It can be seen that this type of photochromic compound can effectively Reduce the size of recorded information and increase storage density.

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Abstract

This invention discloses a new usage of photochromic diarylethenes compound, in which, the inventer verifies from experiments that the near field super resolution optical storage CD with photochromic diarylethenes compound as the mask layer has the advantages of high density and small size in recording information.

Description

technical field [0001] The invention relates to a new application of a photochromic diarylene compound, in particular to an application of the photochromic diarylene compound in near-field super-resolution optical storage. Background technique [0002] With the continuous development of computers and the Internet, the demand for data management and large-capacity data storage continues to grow exponentially, so the need for high-density and large-capacity optical discs is becoming more and more urgent. For optical digital storage of optical discs, the theoretical diffraction limit of 0.6λ / NA determines the minimum value of the recording spot size, where λ is the wavelength of the recording laser, and NA is the numerical aperture associated with the recording instrument system. At present, in order to reduce the size of recording points and increase the density of recording information to meet the growing demand for large-capacity data storage, a lot of work is focused on the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B7/257G11B7/26C09K9/02G11B7/2572
Inventor 张复实石明易家祥刘学东赵福群陈子辉
Owner TSINGHUA UNIV
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