Nonlinear optical response in one-dimensional Mott insulators

被引：2
|
作者：
Takahashi, M [1 ]
Tohyama, T [1 ]
Maekawa, S [1 ]
机构：
[1] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan
来源：
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2002年 / 63卷 / 6-8期
关键词：
optical materials; oxides; optical properties;
D O I：
10.1016/S0022-3697(02)00023-9
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
We theoretically study nonlinear optical susceptibility chi((3)) and photo-excited states of the Mott insulators in one dimension (1D) by using effective models in the strong-coupling limit of a half-filled Hubbard model. The spin-charge separation and large on-site Coulomb interaction play a crucial role in obtaining degenerate odd- and even-parity states in the photo-excited states observed in recent experiments. chi((3)) (-3omega; omega, omega, omega) contains information about both odd- and even-parity states via multi-photon resonance process. We find that the even-parity states can be detected in the \chi((3))(-3omega; omega, omega, omega)\ spectrum as a hump structure. (C) 2002 Published by Elsevier Science Ltd.
引用
收藏
页码：1599 / 1602
页数：4
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