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Two-photon-absorbing recording medium, two-photon-absorbing recording/reproducing method, and two-photon-absorbing recording/reproducing apparatus

A technology for two-photon absorption and recording media, applied in optical recording/reproduction/erasing methods, recording/reproduction with optical methods, recording including reflectivity/absorption/color changes, etc., can solve interlayer crosstalk, optical Low resolution of the recording medium, difficulty in increasing the recording density, etc., to achieve the effect of improving the crosstalk problem

Active Publication Date: 2008-09-17
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these monolithic optical recording media have lower resolution in the depth direction and it is difficult to increase the recording density in this direction due to the interlayer crosstalk generated
It is not yet possible to read information on monolithic optical recording media by reflection (see for example, T.Shiono et al., Jpn.J.Appl.Phys., 2005, 44, 3559-3563).

Method used

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  • Two-photon-absorbing recording medium, two-photon-absorbing recording/reproducing method, and two-photon-absorbing recording/reproducing apparatus
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  • Two-photon-absorbing recording medium, two-photon-absorbing recording/reproducing method, and two-photon-absorbing recording/reproducing apparatus

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Effect test

Embodiment 1

[0467] "Preparation of two-photon absorption recording media"

[0468] (1) Preparation of recording layer coating solution

[0469] -Composition of recording layer coating solution-

[0470] · Two-photon absorption colorant: D-104 (1.2 parts by mass)

[0471] ・Recorded components: the following acid generator I-11 (23.5 parts by mass)

[0472] Acid-colored colorant precursor (material A): crystal violet lactone (23.5 parts by mass)

[0473] Electron-donating compound: 10-methylphenothiazine (51.8 parts by mass)

[0474] Solvent: Chloroform (greater than three times the total mass of the above components)

[0475] The above-mentioned components were mixed to obtain a recording layer coating solution.

[0476]

[0477] (2) Preparation of non-recording layer coating solution

[0478] -Composition of non-recording layer material coating solution-

[0479] · Polyvinyl alcohol (100 parts by mass)

[0480] Solvent: distilled water (greater than six times the total mass of ...

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Abstract

Provided are a two-photon-absorbing recording medium allowing recording and reproduction of a large volume of information, a two-photon-absorbing recording / reproducing method by using the same, and a two-photon-absorbing recording / reproducing apparatus. The two-photon-absorbing recording medium for recording information by simultaneous two-photon absorption is a medium comprising an alternate laminate structure comprising: a thin-film recording layer of a recording material wherein change in the absorption or emission spectrum thereof is generated by two-photon absorption induced by a light irradiated as recording light; and a thin-film non-recording layer, wherein the recording material forming the recording layer comprising at least one of each of (1) a two-photon-absorbing colorant and (2) a material wherein change in the absorption or emission spectrum thereof is generated in a photochemical reaction caused by an excited state of the two-photon-absorbing colorant generated by two-photon absorption of the two-photon-absorbing colorant.

Description

technical field [0001] The present invention relates to a two-photon absorption recording medium using a two-photon absorption colorant, a two-photon absorption recording / reproduction method, and a two-photon absorption recording / reproduction apparatus. Background technique [0002] Two-photon absorption is a phenomenon whereby a compound is excited by simultaneous absorption of two photons, and absorption of two photons by a compound in an energy range in which there is no (linear) absorption band is called non-resonant two-photon absorption. In the following description, unless specifically stated otherwise, two-photon absorption is non-resonant two-photon absorption. [0003] The efficiency of off-resonant two-photon absorption is proportional to the square of the applied optical field (square-law property of two-photon absorption). Therefore, when laser light is irradiated on a two-dimensional plane, two-photon absorption occurs only in the center of the laser spot wher...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B7/244G11B7/24G11B7/24035G11B7/24038G11B7/2467G11B7/2475G11B7/2478G11B7/2498
CPCG11B7/00455B82Y10/00G11B7/246G11B7/2467G11B7/247G11B7/2472G11B7/2475G11B7/2478G11B7/248G11B7/2492G11B7/2498G11B7/252G11B7/2531G11B2007/24624G11B7/244
Inventor 秋叶雅温泷泽裕雄
Owner FUJIFILM CORP
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