Photochromic effect in stoichiometric LiNbO3:Fe,Mn

Hyunkwon Shin, Ganesan Ravi, Yoshishige Uchida, Kenji Kitamura, Myeongkyu Lee

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Stoichiometric LiNbO3 (LN) crystals doubly doped with Fe and Mn exhibited a strong reversible photochromic effect at room temperature. Irradiation with UV light induced a new absorption band extending from approximately λ= 650 nm to the absorption edge, which could also be bleached by subsequent visible illumination. The dark decay times of induced absorption at room temperature were estimated to be approximately 2 months and more than a year for as-grown and oxidized crystals, respectively. Electron paramagnetic resonance analysis confirmed that the photochromic process in LN:Fe,Mn occurs by an intervalence charge transfer between deep Mn 2+/3+ and shallow Fe2+/3+ energy levels. It was also found that only a small fraction of the doping ions are involved in the photochromic process.

Original languageEnglish
Pages (from-to)7504-7507
Number of pages4
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume43
Issue number11 A
DOIs
Publication statusPublished - 2004 Nov 1

Fingerprint

Crystals
room temperature
doped crystals
Ultraviolet radiation
Electron energy levels
Paramagnetic resonance
Charge transfer
Absorption spectra
electron paramagnetic resonance
Lighting
energy levels
illumination
charge transfer
Doping (additives)
Irradiation
absorption spectra
Temperature
irradiation
Ions
decay

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

Shin, Hyunkwon ; Ravi, Ganesan ; Uchida, Yoshishige ; Kitamura, Kenji ; Lee, Myeongkyu. / Photochromic effect in stoichiometric LiNbO3:Fe,Mn. In: Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers. 2004 ; Vol. 43, No. 11 A. pp. 7504-7507.
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Photochromic effect in stoichiometric LiNbO3:Fe,Mn. / Shin, Hyunkwon; Ravi, Ganesan; Uchida, Yoshishige; Kitamura, Kenji; Lee, Myeongkyu.

In: Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, Vol. 43, No. 11 A, 01.11.2004, p. 7504-7507.

Research output: Contribution to journalArticle

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T1 - Photochromic effect in stoichiometric LiNbO3:Fe,Mn

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AU - Ravi, Ganesan

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AU - Kitamura, Kenji

AU - Lee, Myeongkyu

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AB - Stoichiometric LiNbO3 (LN) crystals doubly doped with Fe and Mn exhibited a strong reversible photochromic effect at room temperature. Irradiation with UV light induced a new absorption band extending from approximately λ= 650 nm to the absorption edge, which could also be bleached by subsequent visible illumination. The dark decay times of induced absorption at room temperature were estimated to be approximately 2 months and more than a year for as-grown and oxidized crystals, respectively. Electron paramagnetic resonance analysis confirmed that the photochromic process in LN:Fe,Mn occurs by an intervalence charge transfer between deep Mn 2+/3+ and shallow Fe2+/3+ energy levels. It was also found that only a small fraction of the doping ions are involved in the photochromic process.

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