Patent ID: 8670296

Claim:
An optical information recording medium comprising: a recording layer comprising a multi-photon absorption compound and a one-photon absorption compound; and a supporting member configured to support the recording layer, wherein absorption of multiple photons by the multi-photon absorption compound and absorption of one photon by the one-photon absorption compound cause a void to be generated in the recording layer, whereby information is recordable by modulation based on a presence or absence of a void, wherein the recording layer comprises a plurality of recording layers, wherein the optical information recording medium further comprises an intermediate layer provided between each of two adjacent recording layers, the intermediate layer being unreactive, with respect to one-photon absorption and multi-photon absorption, to irradiation of a recording beam for recording information and irradiation of a reading beam for reading out the information, and wherein the plurality of recording layers have an absorption ratio of one-photon absorption for the recording beam equal to or less than 5% per one layer.