Abstract

KCl K crystals including potassium colloids of some hundred angstroms in diameter, prepared by thermal treating, are capable of highly efficient holographic storage with He-Ne laser as a writing and reading light source.

© 1977 Optical Society of America

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References

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  1. G. E. Scrivener and M. R. Tubbs, “Thick phase holograms in colour centre materials,” Opt. Commun. 10, 32–36 (1974).
    [Crossref]
  2. I. Schneider and M. E. Gingerich, “Diffraction by M centers in KCl,” Appl. Opt. 15, 2428–2431 (1976).
    [Crossref] [PubMed]
  3. P. D. Beresin, J. N. Kompanec, and A. N. Kravec, “Amplitudno-fazovie gologrammi na radiaciono okrascenih kristallah NaCl,” Opt. Spektrosk. 42, 180–183 (1977).
  4. J. Petkovšek and M. Gros, “Highly efficient phase holograms in KCl: K crystal,” Laser 77, Munich20–24 June 1977.
  5. J. C. Penley and R. S. Witte, “Thermal bleaching of additively colored KCl,” J. Appl. Phys. 33, 2875–2879 (1962).
    [Crossref]
  6. J. M. Callejaand and F. Agulló-López, “Nucleation and growth of potassium colloids in KCl single crystals,” Phys. Status Solidi A 25, 473–482 (1974).
    [Crossref]

1977 (1)

P. D. Beresin, J. N. Kompanec, and A. N. Kravec, “Amplitudno-fazovie gologrammi na radiaciono okrascenih kristallah NaCl,” Opt. Spektrosk. 42, 180–183 (1977).

1976 (1)

1974 (2)

G. E. Scrivener and M. R. Tubbs, “Thick phase holograms in colour centre materials,” Opt. Commun. 10, 32–36 (1974).
[Crossref]

J. M. Callejaand and F. Agulló-López, “Nucleation and growth of potassium colloids in KCl single crystals,” Phys. Status Solidi A 25, 473–482 (1974).
[Crossref]

1962 (1)

J. C. Penley and R. S. Witte, “Thermal bleaching of additively colored KCl,” J. Appl. Phys. 33, 2875–2879 (1962).
[Crossref]

Agulló-López, F.

J. M. Callejaand and F. Agulló-López, “Nucleation and growth of potassium colloids in KCl single crystals,” Phys. Status Solidi A 25, 473–482 (1974).
[Crossref]

Beresin, P. D.

P. D. Beresin, J. N. Kompanec, and A. N. Kravec, “Amplitudno-fazovie gologrammi na radiaciono okrascenih kristallah NaCl,” Opt. Spektrosk. 42, 180–183 (1977).

Callejaand, J. M.

J. M. Callejaand and F. Agulló-López, “Nucleation and growth of potassium colloids in KCl single crystals,” Phys. Status Solidi A 25, 473–482 (1974).
[Crossref]

Gingerich, M. E.

Gros, M.

J. Petkovšek and M. Gros, “Highly efficient phase holograms in KCl: K crystal,” Laser 77, Munich20–24 June 1977.

Kompanec, J. N.

P. D. Beresin, J. N. Kompanec, and A. N. Kravec, “Amplitudno-fazovie gologrammi na radiaciono okrascenih kristallah NaCl,” Opt. Spektrosk. 42, 180–183 (1977).

Kravec, A. N.

P. D. Beresin, J. N. Kompanec, and A. N. Kravec, “Amplitudno-fazovie gologrammi na radiaciono okrascenih kristallah NaCl,” Opt. Spektrosk. 42, 180–183 (1977).

Penley, J. C.

J. C. Penley and R. S. Witte, “Thermal bleaching of additively colored KCl,” J. Appl. Phys. 33, 2875–2879 (1962).
[Crossref]

Petkovšek, J.

J. Petkovšek and M. Gros, “Highly efficient phase holograms in KCl: K crystal,” Laser 77, Munich20–24 June 1977.

Schneider, I.

Scrivener, G. E.

G. E. Scrivener and M. R. Tubbs, “Thick phase holograms in colour centre materials,” Opt. Commun. 10, 32–36 (1974).
[Crossref]

Tubbs, M. R.

G. E. Scrivener and M. R. Tubbs, “Thick phase holograms in colour centre materials,” Opt. Commun. 10, 32–36 (1974).
[Crossref]

Witte, R. S.

J. C. Penley and R. S. Witte, “Thermal bleaching of additively colored KCl,” J. Appl. Phys. 33, 2875–2879 (1962).
[Crossref]

Appl. Opt. (1)

J. Appl. Phys. (1)

J. C. Penley and R. S. Witte, “Thermal bleaching of additively colored KCl,” J. Appl. Phys. 33, 2875–2879 (1962).
[Crossref]

Opt. Commun. (1)

G. E. Scrivener and M. R. Tubbs, “Thick phase holograms in colour centre materials,” Opt. Commun. 10, 32–36 (1974).
[Crossref]

Opt. Spektrosk. (1)

P. D. Beresin, J. N. Kompanec, and A. N. Kravec, “Amplitudno-fazovie gologrammi na radiaciono okrascenih kristallah NaCl,” Opt. Spektrosk. 42, 180–183 (1977).

Phys. Status Solidi A (1)

J. M. Callejaand and F. Agulló-López, “Nucleation and growth of potassium colloids in KCl single crystals,” Phys. Status Solidi A 25, 473–482 (1974).
[Crossref]

Other (1)

J. Petkovšek and M. Gros, “Highly efficient phase holograms in KCl: K crystal,” Laser 77, Munich20–24 June 1977.

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Figures (3)

FIG. 1
FIG. 1

Absorption constant vs wavelength for the unprepared crystal quenched from 370 °C to room temperature (dots) and afterwards exposed at 250 °C to the He-Ne laser light (crosses). The arrow marks the He–Ne wavelength.

FIG. 2
FIG. 2

Thermal treatment of the crystal. Crystal has been at 510 °C for 20 min and is quenched to room temperature (dots). Colloids of different sizes have been dispersed to isolated potassium ions and to pairs of them representing F and M centers, respectively. After 80 min of thermal treatment at 400 °C and quenching to room temperature colloidal particles of mean radius 400 Å are present in addition to F centers (crosses).

FIG. 3
FIG. 3

Absorption spectrum variations, measured at room temperature, for two subsequent exposures at 250 °C to the He– Ne laser beam with 2. 8 mW cm−2:10 s (crosses) and again 10 s, altogether 20 s (triangles). No absorption due to small colloids appears at the He–Ne wavelength. After 10 min treatment at 400 °C, the crystal is returned to the state (circles) which is coincident with initial one (dots). At prolonged exposure the absorption band at 7000 Å is observed, which corresponds to smaller colloids appearing at 250 °C. Nonlinearity in its absorption vs exposure may be explained by increasing growth rate of colloids6 at the beginning of their formation.