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

All Science Journal Classification (ASJC) codes

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

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