Multicolored polymer nanocomposites for optical memory storage and security data encryption
AssigneesEugenia Kumacheva, Hung H. Pham, Ilya Gourevich
InventorsEugenia Kumacheva, Hung H. Pham, Ilya Gourevich
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Abstract
An optical data storage device comprised of periodic nanostructured polymer-based material produced from core-shell particles containing one dye in the core and a second dye in the shell. The combinations of dyes can be UV-Vis-dyes or Vis-NIR or UV-NIR. It is shown that selective single-photon photobleaching of the two dyes leads to increase in density of data storage and allows one to employ single-photon photobleaching to achieve the same storage density as in two-photon-writing.
Claims54
An optical data storage device, comprising:
- a nanostructured material having colloidal core particles embedded in at least one shell material with the colloidal core particles forming an array throughout the shell material;
- and
- the colloidal core particles including first light sensitive molecules λ1 incorporated therein with an absorption maximum at a first wavelength Al, and a region of the shell material in close proximity to each colloidal particle including at least second light sensitive molecules incorporated with an absorption maximum at a second wavelength λ2 different from the first wavelength.
A method of producing an optical data storage device, comprising the steps of:
- incorporating first light sensitive molecules into colloidal core particles;
- incorporating second light sensitive molecules into at least one shell forming material;
- encapsulating the colloidal core particles in the at least one shell forming material;
- and
- producing a periodic array of the encapsulated colloidal core particles, and processing the periodic array in such a way that the at least one shell forming material forms a continuous phase in which the colloidal core particles are encapsulated.
A method of storing information in an optical data storage device comprised of nanostructured polymer-based material comprised of an array of colloidal core-shell particles with colloidal cores containing one dye and at least one shell around each colloidal core containing at least a second dye, the method including the steps of
- selective photon photobleaching of at least one of the two dyes in a pre-selected region of the array.
Dependencies are inferred from the claim text.