Abstract: A polyimide includes a non-crosslinked structure including a main chain. The main chain includes a Si—O—C bond. The main chain may include a C—O—Si—O—C bond. The main chain includes, for example, a group denoted by —OSi(R1)(R2)O—. At least one oxygen atom included in the group bonds to, for example, a carbon atom adjacent to the group to form the Si—O—C bond.

Abstract: An optical recording medium of an aspect of the present disclosure includes a recording layer and a dielectric layer positioned on the recording layer and containing a porous organic structural body. A method for recording information of an aspect of the present disclosure includes preparing a light source emitting light having a wavelength of longer than or equal to 390 nm and shorter than or equal to 420 nm and focusing the light from the light source and applying the light to the recording layer of the optical recording medium.

Abstract: A recording medium according to the present disclosure includes a recording layer containing an organic compound having a non-linear optical absorption characteristic. The molar extinction coefficient of the organic compound against light having a wavelength of longer than or equal to 400 nm and shorter than or equal to 405 nm is greater than or equal to 90 mol?1·L·cm?1. In a transient absorption spectrum of the organic compound, an absorbance change ?Abs at a wavelength of longer than or equal to 400 nm and shorter than or equal to 405 nm is a positive value.

Abstract: A recording medium of an aspect of the present disclosure includes a recording layer containing a polymer P. The polymer P contains a group G having nonlinear light absorption characteristics and has a glass transition temperature of higher than or equal to 200° C. A method for recording information of an aspect of the present disclosure includes preparing a light source emitting light having a wavelength of longer than or equal to 390 nm and shorter than or equal to 420 nm and focusing the light from the light source and applying the light to the recording layer of the recording medium.

Abstract: A non-linear optical-absorbing material in an aspect of the present disclosure contains a compound represented by Formula (1) below: in Formula (1) above, R1 to R12 mutually independently represent a group containing at least one atom selected from the group consisting of H, B, C, N, O, F, Si, P, S, Cl, I, and Br.

Abstract: A compound is represented by Formula (1) below, in Formula (1) above, R1 to R22 each independently contain at least one atom selected from the group consisting of H, B, C, N, O, F, Si, P, S, Cl, I, and Br, and L1 and L2 each independently represent a single bond or —C?C—.

Abstract: A recording medium includes a recording layer. The recording layer includes an aliphatic polymer, and a multiphoton absorption compound containing at least one bond selected from the group consisting of a carbon-carbon double bond, a carbon-nitrogen double bond, and a carbon-carbon triple bond, and having a multiphoton absorption characteristic. When the thickness of the recording layer is 100 ?m, the transmittance of the recording layer in the thickness direction with respect to light having a wavelength of 405 nm is greater than or equal to 80%.

Abstract: A recording medium includes a recording layer. The recording layer includes an aliphatic polymer, and a multiphoton absorption compound containing at least one bond selected from the group consisting of a carbon-carbon double bond, a carbon-nitrogen double bond, and a carbon-carbon triple bond, and having a multiphoton absorption characteristic. When the thickness of the recording layer is 100 ?m, the transmittance of the recording layer in the thickness direction with respect to light having a wavelength of 405 nm is greater than or equal to 80%.

Abstract: A light absorption material includes a compound represented by the following formula (1) as a main component: In the formula (1), R1 to R14 each independently include at least one atom selected from the group consisting of H, C, N, O, F, P, S, Cl, I, and Br, and n is an integer greater than or equal to 2.

Abstract: A nonlinear light absorption material includes a compound represented by the following formula (1) as a main component: in the formula (1), R1 to R6 are each independently a hydrocarbon group.

Abstract: A nonlinear light absorption material includes a compound having a nonlinear light absorption property at a wavelength of 390 nm or more and 420 nm or less and represented by the formula (1) as a main component: in the formula (1), X is an oxygen atom.

Abstract: A nonlinear light absorption material includes a compound represented by the following formula (1) as a main component: in the formula (1), R1 to R10 are each 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 sulfonate group, an acylthio group, an alkylsulfonyl group, a sulfonamide group, a primary amino group, a secondary amino group, a tertiary amino group, or a nitro group.

Abstract: A nonlinear optical material is represented by the following formula (1). At least one selected from the group consisting of R1 to R5, at least one selected from the group consisting of R6 to R10, and at least one selected from the group consisting of R11 to R15 are represented by the following formula (2).

Abstract: A non-linear optical material is represented by formula (1) below. In formula (1), L1 to L3 are each independently represented by formula (2) or (3) below.

Abstract: A nonlinear optical material is represented by the following formula (1).

Abstract: A light-absorbing material includes a compound represented by the formula (1) below.