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Proceedings Paper

Two-dimensional model of electromagnetic wave propagation in the volume holographic recording using photorefractive polymer
Author(s): Shahram Shiri; Murray H. Loew; Richard G. Lyon; Wasyl Wasylkiwskyj
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Paper Abstract

The photorefractive polymer based holographic memories provide the alternative of achieving terabytes of digital data storage with gigabits per seconds of transfer. The stored information in the medium is in the form of electromagnetic distribution and it is governed by the second order inhomogeneous Helmholtz equations with no known exact solution. A numerical approximation using finite element method is employed to model the wave propagation in the polymer. The model is used to approximate the Helmholtz equation for a spatially varying index of refraction medium subject to input of polarized planar waves. The initial results from the mathematical formulation conform to the theoretical expectation of wave propagation on the non-conducting and non-magnetic materials. In addition, assuming periodicity of the inhomogeneous material, the reflective waves are computed and conservation of energy on the medium is verified. The model is used to simulate electromagnetic wave propagation through a two- dimensionally varying index of refraction poly (N- vynilcarbazol) (PVK) polymer. The transmitive waves are computed at various angles of incidents. The stored hologram represented as transmitive wave is reconstructed in reading process.

Paper Details

Date Published: 25 April 2000
PDF: 10 pages
Proc. SPIE 3977, Medical Imaging 2000: Physics of Medical Imaging, (25 April 2000); doi: 10.1117/12.384547
Show Author Affiliations
Shahram Shiri, George Washington Univ. (United States)
Murray H. Loew, George Washington Univ. (United States)
Richard G. Lyon, NASA Goddard Space Flight Ctr. (United States)
Wasyl Wasylkiwskyj, George Washington Univ. (United States)

Published in SPIE Proceedings Vol. 3977:
Medical Imaging 2000: Physics of Medical Imaging
James T. Dobbins III; John M. Boone, Editor(s)

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