Three-dimensional optical memory

Details Three-dimensional optical memory Three-dimensional optical memory

1991-12-20

1993-10-12

LaRoche, Eugene R.

Static information storage and retrieval

Radiant energy

365125, 369100, 369121, G11C 1300, G11B 700

Patent

active

052531988

ABSTRACT:
A high density rapid access data storage device employs a volume of field-oriented bacteriorhodopsin in a polymer medium, and contained in a vessel that can be accurately displace in three dimensions. X-axis and Y-axis laser illumination systems each converge a beam in the respective direction at a location at which a particular bit cell is to have a "1" or "0" recorded or is to be interrogated. Both laser systems are pulsed on at one wavelength to write a "1" or at a second wavelength to write a "0". After writing, a cleaning step is carried out by actuating the laser systems non-simultaneously at the other of the wavelengths to remove any undesired photochemistry from adjacent bit cells. A read cycle involves actuating two or four lasers, and then discriminating the "1" or "0" state from the electrical signal generated by the medium.

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Birge, Nature of the primary photochemical events in rhodopsin and bacteriorhodopsin, Biochimica et Biophysica Acta.
Birge, Photophysics and Molecular Electronic Applications of the Phodopsins, Annu. Rev. Phys. Chem. 1990.
Parthenopoulos et al., Three Dimensional Optical Storage Memory Department of Chemistry, University of California.

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