Ultrafast optical nonlinearity in the quasi-one-dimensional Mott insulator Sr2CuO3

被引：126

作者：

Ogasawara, T

Ashida, M

Motoyama, N

Eisaki, H

Uchida, S

Tokura, Y

Ghosh, H

Shukla, A

Mazumdar, S

Kuwata-Gonokami, M

机构：

[1] Univ Tokyo, Dept Appl Phys, Bunkyo Ku, Tokyo 1138656, Japan

[2] ERATO, Cooperat Excitat Project, Japan Sci & Technol Corp, JST,Takatsu Ku, Kanagawa 2130012, Japan

[3] Univ Arizona, Dept Phys, Tucson, AZ 85721 USA

[4] Univ Arizona, Ctr Opt Sci, Tucson, AZ 85721 USA

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 85卷 / 10期

关键词：

D O I：

10.1103/PhysRevLett.85.2204

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report strong instantaneous photoinduced absorption in the quasi-one-dimensional Mott insulator Sr2CuO3 in the IR spectral region. The observed photoinduced absorption is to an even-parity two-photon state that occurs immediately above the absorption edge. Theoretical calculation based on a two-band extended Hubbard model explains the experimental Features and indicates that the strong two-sphoton absorption is due to a very large dipole coupling between nearly degenerate one- and two-photon stares. Room temperature picosecond recovery of the optical transparency suggests the strong potential of Sr2CuO3 for all-optical switching.

引用

页码：2204 / 2207

页数：4

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