Bismuth manganite: A multiferroic with a large nonlinear optical response

被引：93
作者：
Sharan, A [1 ]
Lettieri, J
Jia, YF
Tian, W
Pan, XQ
Schlom, DG
Gopalan, V
机构：
[1] Penn State Univ, Mat Res Inst, University Pk, PA 16802 USA
[2] Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA
[3] Univ Michigan, Dept Mat Sci & Engn, Ann Arbor, MI 48109 USA
来源：
PHYSICAL REVIEW B | 2004年 / 69卷 / 21期
关键词：
D O I：
10.1103/PhysRevB.69.214109
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We report evidence for ferroelectricity in bismuth manganite epitaxial films from optical second-harmonic generation (SHG). The change in the polar symmetry of SHG signals under external electric fields is correlated to specific changes in the ferroelectric domain microstructures. We also observe giant enhancement of SHG by 3 to 4 orders of magnitude with effective d(f)similar to193 pm/V under electric fields of similar to707 V/mm. The material also exhibits a large third-order nonlinear optical response with nonlinear absorption coefficient alpha(I)similar to-0.08 cm/kW and nonlinear refractive index n(I)similar to-0.53x10(-9) cm(2)/W.
引用
收藏
页码：214109 / 1
页数：7
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