周期性极化KTP晶体中前向受激极化子散射的控制

Control of forward stimulated polariton scattering in periodically-poled KTP crystals.

作者信息

Jang Hoon, Strömqvist Gustav, Pasiskevicius Valdas, Canalias Carlota

出版信息

Opt Express. 2013 Nov 4;21(22):27277-83. doi: 10.1364/OE.21.027277.

DOI:10.1364/OE.21.027277

Abstract

We report suppression of forward stimulated polariton scattering (SPS) in χ((2)) structured media. Periodic poling in KTiOPO(4) (KTP) leads to the destructive interference of phonon-polariton waves, which is responsible for the dependence of the SPS threshold on the poling period. This was confirmed by comparing the SPS thresholds in periodically-poled KTP (PPKTP) crystals with different poling periods. Further confirming the physical picture, we studied the changes in the Stokes power distribution as a function of the rotation angle of the PPKTP crystal.

摘要

我们报道了在χ((2))结构介质中对正向受激极化子散射（SPS）的抑制。在磷酸钛氧钾（KTP）中的周期性极化导致声子-极化子波的相消干涉，这决定了SPS阈值对极化周期的依赖性。通过比较不同极化周期的周期性极化KTP（PPKTP）晶体中的SPS阈值，这一点得到了证实。为进一步证实这一物理图像，我们研究了斯托克斯功率分布随PPKTP晶体旋转角度的变化。