Writing and reading fluorescent optical storage media using Bessel beams
AssigneeSeagate Technology LLC
InventorsRaghu Ambekar Ramachandra Rao, Joachim Walter Ahner, Aditya Jain, Riyan Alex Mendonsa
Life of this patent
Estimating the term…
Abstract
Disclosed are fluorescent optical storage systems that include fluorescent optical media having one or more recordable layers, and a writer configured to direct an excitation beam on the fluorescent optical media. The excitation beam, which is capable of inducing a photochemical reaction in a selected layer of the one or more recordable layers, is generated from a Bessel beam. Such systems are capable of writing a sub-wavelength resolutions, which can be read using stimulated emission depletion. Light sheets may be used to selectively identify layers for writing.
Claims18
A fluorescent optical storage system comprising:
- a fluorescent optical media including one or more recordable layers;
- a writer configured to direct an excitation beam on the fluorescent optical media, the excitation beam capable of inducing a photochemical reaction in a selected layer of the one or more recordable layers, wherein the excitation beam is generated from a Bessel beam;
- and
- a light sheet generator configured to produce a light sheet that selectively illuminates the selected layer of the one or more recordable layers to thereby assist in inducing the photochemical reaction in locations where the excitation beam intersects with the light sheet.
A method for writing information onto a fluorescent optical storage media, the method comprising the steps of:
- forming an excitation beam having a profile characterized by a Bessel function;
- directing the excitation beam on a recordable layer of the fluorescent optical storage media to thereby induce a photochemical reaction in the recordable layer at an area illuminated by the excitation beam;
- and
- selectively illuminating the recordable layer with a light sheet that assists the excitation beam in inducing the photochemical reaction in the recordable layer.
Dependencies are inferred from the claim text.