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Optics Letters

Optics Letters

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  • Vol. 22, Iss. 8 — Apr. 15, 1997
  • pp: 555–557

Nondestructive readout of a three-dimensional photochromic optical memory with a near-infrared differential phase-contrast microscope

A. Toriumi, J. M. Herrmann, and S. Kawata  »View Author Affiliations


Optics Letters, Vol. 22, Issue 8, pp. 555-557 (1997)
http://dx.doi.org/10.1364/OL.22.000555


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Abstract

A three-dimensional (3D) rewritable optical memory using photochromic material is described for high-density memory. The bits are recorded in a 3D volume of photochromic material. A transformation of the photochromic molecule between two isomers with different absorption spectra can be stimulated by irradiation with appropriate wavelengths. We show that a nondestructive readout of photochromic memory is possible by use of a small difference in the refractive index of the photochromic isomers in the near-IR range. For this purpose a near-IR laser-scan differential phase-contrast microscope is used. Experimental results of 3D recording and nondestructive reading are presented.

© 1997 Optical Society of America

Citation
A. Toriumi, J. M. Herrmann, and S. Kawata, "Nondestructive readout of a three-dimensional photochromic optical memory with a near-infrared differential phase-contrast microscope," Opt. Lett. 22, 555-557 (1997)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-22-8-555


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