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Proceedings Paper

Studies on 3D volume memory
Author(s): Alexander S. Dvornikov; Peter M. Rentzepis
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Paper Abstract

The need to store large amounts of information in small volumes cannot be overstated, nor can the need for these memories to be capable of large bandwidths and parallel access of the information be overemphasized. Three-dimensional (3-D) storage may provide a desirable solution to these needs. The various possible avenues which may lead to 3-D information storage include hole burning, phase hologram, and two photon processes using organic semiconductors and biomolecules such as bactiochadorpsin. In this paper we restrict discussion to the last topic, namely, 3-D storage by means of two-photon absorption, particularly in the utilization of organic photochromic materials. In previous communications we have presented experimental data which suggest a possibility for constructing useful 3-D volume memory devices based upon two-photon virtual excitation processes. In this paper we discuss the means for writing and reading information within a 3-D storage memory, describe the materials used, and present a status report on their relevant properties. The theoretical bases for two-photon processes were established long ago, originating theoretically in 1932 and experimentally in the early 1960s. The probability for a two-photon transition may be expressed as a function of three parameters: line profile, transition probability for all possible two-photon processes, and intensity.

Paper Details

Date Published: 1 April 1992
PDF: 8 pages
Proc. SPIE 1662, Image Storage and Retrieval Systems, (1 April 1992); doi: 10.1117/12.58503
Show Author Affiliations
Alexander S. Dvornikov, Univ. of California/Irvine (United States)
Peter M. Rentzepis, Univ. of California/Irvine (United States)

Published in SPIE Proceedings Vol. 1662:
Image Storage and Retrieval Systems
Albert A. Jamberdino; Carlton Wayne Niblack, Editor(s)

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