Spatial control of second-harmonic light from a disordered structure

被引：5

作者：

Rodriguez, Francisco J. ^{[1
]}

Yao, Can ^{[1
]}

Bravo-Abad, Jorge ^{[2
]}

Martorell, Jordi ^{[1
,3
]}

机构：

[1] ICFO Inst Ciencies Foton, Mediterranean Technol Pk, Barcelona 08860, Spain

[2] Autonomous Univ Madrid, Dept Fisica Teorcia Mat Condensada, E-28049 Madrid, Spain

[3] Univ Politecn Cataluna, Dept Fisica & Engn Nuclear, E-08028 Barcelona, Spain

来源：

PHOTONIC CRYSTAL MATERIALS AND DEVICES X | 2012年 / 8425卷

关键词：

SBN; speckle; spatial light modulator; second harmonic generation; random; SCATTERING;

D O I：

10.1117/12.921765

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

The second harmonic light generated in crystals with a random distribution of nonlinear domains is usually emitted in a broad range of directions. When the fundamental light has good coherence, the intensity of the second harmonic shows a speckle pattern even when the crystal is transparent. We explain that with the interference at the detection point of the second harmonic generated by the different domains. Using a phase-only spatial light modulator in the fundamental beam, it is possible to concentrate the second harmonic intensity in one direction at the same time that the intensity is reduced in the other directions. In our experiments we measured enhancements in the selected direction up of 700 times over the average intensity in other directions.

引用

页数：8

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