Threshold response using modulated continuous wave illumination for multilayer 3D optical data storage

A threshold writing mechanism in fluorescence-based data storage media based on dye-doped co-extruded multilayer films is investigated. A photothermal process can be used to write data in a simple dye/polymer system, leading to a threshold response similar to commercial optical data storage media.The threshold writing process was studied over a range of exposure times and intensities, and with different fluorescent dyes. It was found that all of the dyes have a common temperature threshold where fluorescence begins to attenuate, and the physical nature of the thermal process was investigated.

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DOI: 10.1063/1.4974867

Non-Linear Fluorescence Modulation of an Organic Dye for Optical Data Storage

Data writing nonlinear in intensity has been demonstrated.  This allows low crosstalk between layers so that data can be written in many layers, read many, many times, and can be written at high speed.

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DOI: 10.1364/JOSAB.31.000637

Roll-to-Roll Fabrication of Multilayer Films for High Capacity Optical Data Storage

Co-extrusion is able to produce films on a much larger scale at a much lower cost than current methods. The material compatibility and mechanical flexibility allow for new data formats with higher capacities to be realized.

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DOI: 10.1002/adma.201200669