Photochromic effect in stoichiometric LiNbO3:Fe,Mn

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

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


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
Issue number11 A
Publication statusPublished - 2004 Nov

All Science Journal Classification (ASJC) codes

  • General Engineering
  • General Physics and Astronomy


Dive into the research topics of 'Photochromic effect in stoichiometric LiNbO3:Fe,Mn'. Together they form a unique fingerprint.

Cite this