Search

CN-117296096-B - Nonlinear light absorbing material, recording medium, information recording method, and information reading method

CN117296096BCN 117296096 BCN117296096 BCN 117296096BCN-117296096-B

Abstract

The nonlinear light absorbing material in one embodiment of the present disclosure contains a compound represented by the following formula (1) as a main component. In formula (1), R 1 ～R 10 is independently of one another a hydrogen atom, a halogen atom, a saturated hydrocarbon group, a haloalkyl group, an unsaturated hydrocarbon group, a hydroxyl group, a carboxyl group, an alkoxycarbonyl group, an aldehyde group, an acyl group, an amide group, a nitrile group, an alkoxy group, an acyloxy group, a thiol group, an alkylthio group, a sulfonic acid group, an acyl thio group, an alkylsulfonyl group, a sulfonamide group, a primary amino group, a secondary amino group, a tertiary amino group or a nitro group.

Inventors

  • Yokoyama maiko
  • MUTO YASUHIKO
  • ANDO KOTA
  • ARAKI HIDEKAZU

Assignees

  • 松下知识产权经营株式会社

Dates

Publication Date
20260505
Application Date
20220317
Priority Date
20210520

Claims (9)

  1. 1. A nonlinear light absorbing material comprising a compound represented by the following formula (1) as a main component, In the formula (1), R 1 ～R 10 is independently a hydrogen atom, a halogen atom, a saturated hydrocarbon group, a haloalkyl group, an unsaturated hydrocarbon group, a hydroxyl group, a carboxyl group, an alkoxycarbonyl group, an aldehyde group, an acyl group, an amide group, a nitrile group, an alkoxy group, an acyloxy group, a thiol group, an alkylthio group, a sulfonic acid group, an acyl thio group, an alkylsulfonyl group, a sulfonamide group, a primary amino group, a secondary amino group, a tertiary amino group, or a nitro group.
  2. 2. The nonlinear light absorbing material according to claim 1, wherein the compound is represented by the following formula (2) or (3),
  3. 3. The nonlinear light absorbing material according to claim 1, wherein each of R 1 to R 10 is a hydrogen atom.
  4. 4. The nonlinear light absorbing material according to any one of claims 1 to 3, wherein the compound has a nonlinear light absorbing effect.
  5. 5. The nonlinear light absorbing material according to any one of claims 1 to 4, which is used for a device that uses light having a wavelength of 390nm or more and 420nm or less.
  6. 6. A recording medium comprising a recording layer comprising the nonlinear light absorbing material according to any one of claims 1 to 5.
  7. 7. A recording method of information, comprising: Preparing a light source for emitting light having a wavelength of 390nm or more and 420nm or less, and Condensing the light from the light source, and irradiating the recording layer in a recording medium containing the nonlinear light absorbing material in claim 6.
  8. 8. A method for reading information recorded by the recording method according to claim 7, The readout method includes: Measuring optical characteristics of the recording layer by irradiating light to the recording layer in the recording medium, and The information is read out by the recording layer.
  9. 9. The readout method according to claim 8, wherein the optical characteristic is an intensity of light reflected in the recording layer.

Description

Nonlinear light absorbing material, recording medium, information recording method, and information reading method Technical Field The present disclosure relates to a nonlinear light absorbing material, a recording medium, a recording method of information, and a reading method of information. Background Among Optical materials such as light absorbing materials, materials having a nonlinear Optical (Non-Linear Optical) effect are called nonlinear Optical materials. The nonlinear optical effect is an optical phenomenon in which, when a substance is irradiated with intense light such as laser light, the substance generates an electric field that is proportional to the square or higher order of the square of the electric field of the irradiated light. Examples of the optical phenomenon include absorption, reflection, scattering, and luminescence. The second order nonlinear optical effect proportional to the square of the electric field of the irradiation light includes Second Harmonic Generation (SHG), the pockels effect, and the parametric effect. As nonlinear optical effects of three times proportional to the third power of the electric field of the irradiation light, two-photon absorption, multiphoton absorption, third Harmonic Generation (THG), kerr effect, and the like can be cited. In this specification, multiphoton absorption such as two-photon absorption may be referred to as nonlinear light absorption. Materials that can undergo nonlinear light absorption are sometimes referred to as nonlinear light absorbing materials. In particular, a material capable of two-photon absorption is sometimes referred to as a two-photon absorption material. For nonlinear optical materials, many studies have been actively conducted so far. In particular, as a nonlinear optical material, an inorganic material that can easily produce a single crystal has been developed. In recent years, development of a nonlinear optical material including an organic material has been desired. Organic materials have not only a high degree of freedom of design but also a large nonlinear optical constant compared to inorganic materials. Further, the organic material has a nonlinear response at a high speed. In this specification, a nonlinear optical material containing an organic material is sometimes referred to as an organic nonlinear optical material. Prior art literature Patent literature Patent document 1 Japanese patent No. 5659189 Patent document 2 Japanese patent No. 5821661 Patent document 3 Japanese patent application laid-open No. 2013-242939 Non-patent literature Non-patent literature 1：Harry L.Anderson et al,"Two-Photon Absorption and the Design of Two-Photon Dyes",Angew.Chem.Int.Ed.2009,Vol.48,p.3244-3266. Disclosure of Invention Problems to be solved by the invention There is room for improvement in conventional nonlinear light absorbing materials for improving nonlinear absorption characteristics with respect to light having a wavelength in a short wavelength region. Means for solving the problems The nonlinear light absorbing material in one aspect of the present disclosure comprises The compound represented by the following formula (1) is used as a main component. [ Chemical formula 1] In the above formula (1), R 1～R10 is independently a hydrogen atom, a halogen atom, a saturated hydrocarbon group, a halogenated alkyl group, an unsaturated hydrocarbon group, a hydroxyl group, a carboxyl group, an alkoxycarbonyl group, an aldehyde group, an acyl group, an amide group, a nitrile group, an alkoxy group, an acyloxy group, a thiol group, an alkylthio group, a sulfonic acid group, an acyl thio group, an alkylsulfonyl group, a sulfonamide group, a primary amino group, a secondary amino group, a tertiary amino group or a nitro group. Effects of the invention The present disclosure provides a nonlinear light absorbing material suitable for improving nonlinear absorption characteristics with respect to light having a wavelength in a short wavelength region. Drawings Fig. 1A is a flowchart of a recording method of information regarding a recording medium using a nonlinear light absorbing material including an embodiment of the present disclosure. Fig. 1B is a flowchart of a method of reading information regarding a recording medium using a nonlinear light absorbing material including an embodiment of the present disclosure. FIG. 2A is a chart showing 1 H-NMR spectrum of compound (2) -1. FIG. 2B is a chart showing the 13 C-NMR spectrum of compound (2) -1. Detailed Description (Insight underlying the present disclosure) Of the organic nonlinear optical materials, two-photon absorbing materials are of particular interest. The two-photon absorption is a phenomenon in which a compound absorbs two photons almost simultaneously and transits to an excited state. As two-photon absorption, simultaneous two-photon absorption and staged two-photon absorption are known. While two-photon absorption is sometimes also referred to as non-resonant two-