Abstract
Lithium niobate (LiNbO3) is an important synthetic crystal because of its good electro-optic, acousto-optic, elasto-optic, piezoelectric, pyroelectric, and nonlinear optic properties. Photorefraction is one of its most important properties since this effect can be utilized in holographic storage, laser physics, and information processing, although it hinders the usage of LiNbO3 as a frequency doubler, optical parametric oscillator, and Q-switch. It is found that a certain amount of MgO doped into LiNbO3 will suppress the optical damage in the visible, however it will significantly enhance the photorefractivity of LiNbO3 in the ultraviolet (UV) [1]. For years, people find it difficult to explain this unusual photorefraction enhancement in the UV because of the valence stability of the element Mg. Recently, Vikhnin et al. demonstrated theoretically and experimentally an exciton structure named charge transfer vibronic excitons (CTVE) in ABO3-type ferroelectric oxides [2]. They believed that the CTVE is composed of a well-correlated pair of electronic and hole polarons with its energy level located just above the top of the valence band.
© 2011 Optical Society of America
PDF ArticleMore Like This
S. Ashihara and S. Enomoto
EF_P13 European Quantum Electronics Conference (EQEC) 2011
Yasunori Furukawa, Kenji Kitamura, Shunji Takekawa, Alex Alexandrovski, Gisele Foulon, Roger K. Route, and Martin M. Fejer
MF8 Advanced Solid State Lasers (ASSL) 2000
H. Ishizuki and T. Taira
MB7 Advanced Solid-State Photonics (ASSL) 2007