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Nickel porphyrins for memory optical applications

United States Patent

September 12, 2000
View the Complete Patent at the US Patent & Trademark Office
Sandia National Laboratories - Visit the Intellectual Property Management and Licensing Website
The present invention relates to a nickel-porphyrin derivative in a matrix, the nickel-porphyrin derivative comprising at least two conformational isomers, a lower-energy-state conformer and a higher-energy-state conformer, such that when the higher-energy-state conformer is generated from the lower-energy-state conformer following absorption of a photon of suitable energy, the time to return to the lower-energy-state conformer is greater than 40 nanoseconds at approximately room temperature. The nickel-porphyrin derivative is useful in optical memory applications.
Shelnutt; John A. (Tijeras, NM), Jia; Songling (Albuquerque, NM), Medforth; Craig (Vacaville, CA), Holten; Dewey (St. Louis, MO), Nelson; Nora Y. (Manteca, CA), Smith; Kevin M. (Davis, CA)
Sandia Corporation (
09/ 067,408
April 28, 1998
This invention was made with Government support under Contract No. DE-AC04-94AL85000 awarded by the Department of Energy. The Government has certain rights in the invention.