Second harmonic generation in a strontium barium niobate crystal with a random domain structure

被引：16
|
作者：
Kuznetsov, K. A. [1 ]
Kitaeva, G. Kh. [1 ]
Shevlyuga, A. V. [1 ]
Ivleva, L. I. [2 ]
Volk, T. R. [3 ]
机构：
[1] Moscow MV Lomonosov State Univ, Dept Phys, Moscow 119991, Russia
[2] Russian Acad Sci, Prokhorov Gen Phys Inst, Moscow 119991, Russia
[3] Russian Acad Sci, AV Shubnikov Crystallog Inst, Moscow 119333, Russia
来源：
JETP LETTERS | 2008年 / 87卷 / 02期
关键词：
D O I：
10.1134/S0021364008020070
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The phenomenon of the second-harmonic (SH) generation in a strontium barium niobate (SBN) crystal in directions not obeying the conditions of phase matching for spatially homogeneous media has been studied. The appearance of the SH signal is interpreted as resulting from the quasi-phase-matching nonlinear wave interaction due to the random domain structure of the SBN crystal containing acicular ferroelectric microdomains. A theoretical model describing the SH generation in such two-dimensional, spatially inhomogeneous nonlinear optical structures is proposed. An analysis of the second-harmonic emission directivity patterns shows that the main contribution to the noncollinear SH generation in SBN is due to near-surface domains extending to a depth of up to several dozen microns.
引用
收藏
页码：98 / 102
页数：5
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