Pump-probe study of E(TO) polaritons in Zn-doped LiNbO3

C. C. Lee, C. T. Chia, Y. M. Chang, M. L. Sun, M. L. Hu

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Results of femtosecond pump-probe measurement of E(TO)-like polaritons in Zn-doped lithium niobate crystals are presented. The impulsive-stimulated-Raman-induced three delay-time oscillations, ω 1, ω2 and ω3, are found and assigned to the linear combinations of three lowest E(TO)-like polaritons, ν1, ν2, and ν3, which are ω 1 = ν2 - ν1, ω2 = ν3 - ν1 and ω3 = 2ν 1. The obtained frequencies of ω1, ω 2 and ω3 are well explained by dielectric dispersion calculation. The lifetimes of these oscillations induced by the electro optical effect are also deduced, and they are strongly correlated with the Raman lineshape of E(TO) phonons. Our results also imply that the vibrations of E(TO1) and E(TO2) are mainly attributed to the Nb and O atomic motions, while the vibration of E(TO3) is dominated by the defect structure.

Original languageEnglish
Pages (from-to)6829-6833
Number of pages5
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume43
Issue number9 B
DOIs
Publication statusPublished - 2004 Sep 1

Keywords

  • Dephasing time
  • E(TO) phonon
  • Lithium niobate
  • Polariton
  • Raman
  • Zn doped

ASJC Scopus subject areas

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

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