Optical information storage medium
AssigneeCase Western Reserve University
InventorsKenneth D. Singer, Chris Ryan, Jie Shan, Joseph Lott, Christoph Weder, Brent Valle, Eric Baer
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Abstract
An optical information storage medium includes a multilayer film that includes a plurality of extruded alternating active data storage layers and buffer layers, which separate the active data storage layers. The active data storage layers and buffer layers have thicknesses that allow the active data storage layers to be writable by non-linear or threshold writing processes to define data voxels within the active data storage layers that are readable by an optical reading device.
Claims30
An optical information storage medium comprising a multilayer polymeric film that includes a plurality of coextruded alternating polymeric active data storage layers and polymeric buffer layers, which separate the active data storage layers, the active data storage layers including a fluorescent dye and/or semiconductor nanoparticles that undergo a permanent optically induced localized nonlinear or threshold change of fluorescence intensity when written by a single wavelength nonlinear or threshold optical writing process with excitation within the absorption band of the fluorescent dye and/or semiconductor nanoparticles and at least one data voxel written and confined within a discrete active data storage layer of the active storage layers by the single wavelength nonlinear or threshold optical writing process, the active data storage layers and buffer layers having thicknesses that allow the active data storage layers to be writable by the single wavelength nonlinear or threshold optical writing process with excitation within a single-photon absorption band of the fluorescent dye and/or semiconductor nanoparticles to define the at least one data voxel within the discrete active data storage layer that is readable by an optical reading device, wherein the buffer layers have an average thickness of 3 μm to about 100 μm.
An optical information storage medium comprising a multilayer polymeric film that includes a plurality of coextruded alternating polymeric active data storage layers and polymeric buffer layers, the active data storage layers configured to undergo a permanent photothermally induced localized nonlinear or threshold change of optical properties when written by a one photon or multi-photon optical writing process, the buffer layers separating the active data storage layers with sufficient thicknesses to axially confine at least one data voxel written by the optical writing process into a single discrete active data storage layer that is readable by an optical reading device, wherein the buffer layers have an average thickness of 3 μm to about 100 μm.
An optical information storage system comprising:
- a multilayer polymeric film that includes a plurality of coextruded alternating polymeric active data storage layers and polymeric buffer layers, the active data storage layers configured to undergo a permanent photothermally induced localized nonlinear or threshold change of optical properties when written by a one photon or multi-photon optical writing process, the buffer layers separating the active data storage layers with sufficient thicknesses to axially confine at least one data voxel written by the optical writing process into a single discrete active data storage layer that is readable by an optical reading device, wherein the buffer layers have an average thickness of 3 μm to about 100 μm;
- and a laser for optical writing.
A method of storing data, the method comprising:
- providing a multilayer polymeric film that includes a plurality of coextruded alternating polymeric active data storage layers and polymeric buffer layers, the active data storage layers configured to undergo a permanent photothermally induced localized nonlinear or threshold change of optical properties when written by a one photon or multi-photon optical writing process, the buffer layers separating the active data storage layers with sufficient thicknesses to axially confine at least one data voxel written by the optical writing process into a single discrete active data storage layer that is readable by an optical reading device, wherein the buffer layers have an average thickness of 3 μm to about 100 μm;
- and
- writing at least one data voxel in the active data storage layers using the optical writing process.
Dependencies are inferred from the claim text.