Electron paramagnetic resonance investigation of the photochromic effect in near-stoichiometric LiNbO3 with applications to holographic storage

Myeongkyu Lee, In Gyoo Kim, Shunji Takekawa, Yasunori Furukawa, Yoshishige Uchida, Kenji Kitamura, Hideki Hatano

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Near-stoichiometric LiNbO3 (LiNbO3, LiNbO3:Tb, and LiNbO3:Tb,Fe) crystals have exhibited a reversible photochromic effect at room temperature. Irradiation by UV light induced a visible absorption band extending from λ≈650 nm to the absorption edge, which could be bleached by subsequent illumination with visible light. Electron paramagnetic resonance (EPR) analysis at 15 K revealed an EPR signal of g≈2.0 appearing after UV irradiation with a simultaneous decrease in the Fe3+ signal intensity. This implies that the Fe3+ ions (natural impurities or dopants) act as electron traps and the induced absorption band is caused by the charge transfer from UV-sensitive absorption centers to Fe3+ ions via the conduction band. Using the induced absorption band, a high-sensitive holographic recording has been achieved with a continuous-wave green laser at λ≈532 nm. In addition, the fast response to UV light made it possible to quickly erase the stored information by UV illumination.

Original languageEnglish
Pages (from-to)5311-5317
Number of pages7
JournalJournal of Applied Physics
Volume89
Issue number10
DOIs
Publication statusPublished - 2001 May 15

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electron paramagnetic resonance
absorption spectra
illumination
impurities
irradiation
continuous radiation
conduction bands
recording
charge transfer
traps
room temperature
crystals
lasers
electrons

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Lee, Myeongkyu ; Kim, In Gyoo ; Takekawa, Shunji ; Furukawa, Yasunori ; Uchida, Yoshishige ; Kitamura, Kenji ; Hatano, Hideki. / Electron paramagnetic resonance investigation of the photochromic effect in near-stoichiometric LiNbO3 with applications to holographic storage. In: Journal of Applied Physics. 2001 ; Vol. 89, No. 10. pp. 5311-5317.
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Electron paramagnetic resonance investigation of the photochromic effect in near-stoichiometric LiNbO3 with applications to holographic storage. / Lee, Myeongkyu; Kim, In Gyoo; Takekawa, Shunji; Furukawa, Yasunori; Uchida, Yoshishige; Kitamura, Kenji; Hatano, Hideki.

In: Journal of Applied Physics, Vol. 89, No. 10, 15.05.2001, p. 5311-5317.

Research output: Contribution to journalArticle

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AU - Furukawa, Yasunori

AU - Uchida, Yoshishige

AU - Kitamura, Kenji

AU - Hatano, Hideki

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