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Smart optically induced nonlinear photonic crystals for frequency conversion and control
Applied Physics Letters ( IF 4 ) Pub Date : 2020-02-03 , DOI: 10.1063/1.5141420
Dawei Liu 1 , Shan Liu 1 , Leszek Mateusz Mazur 2, 3 , Bingxia Wang 4 , Peixiang Lu 4 , Wieslaw Krolikowski 1, 2 , Yan Sheng 1
Affiliation  

We extend the functionality of nonlinear photonic crystals by fabricating a structure combining a few individual optical transformations in second harmonic generation. In particular, we employed all-optical spontaneous polarization reversal in ferroelectrics to create nonlinear holograms with curved fork-like spatial modulation of nonlinearity for the generation of second harmonic optical vortices. The curved fork-like structure represents a combination of a standard vortex harmonic generator (fork structure) and an axicon, thereby allowing us to realize the second harmonic “perfect vortices” whose diameter remains constant independently of their topological charge.We extend the functionality of nonlinear photonic crystals by fabricating a structure combining a few individual optical transformations in second harmonic generation. In particular, we employed all-optical spontaneous polarization reversal in ferroelectrics to create nonlinear holograms with curved fork-like spatial modulation of nonlinearity for the generation of second harmonic optical vortices. The curved fork-like structure represents a combination of a standard vortex harmonic generator (fork structure) and an axicon, thereby allowing us to realize the second harmonic “perfect vortices” whose diameter remains constant independently of their topological charge.

中文翻译:

用于频率转换和控制的智能光致非线性光子晶体

我们通过制造一种在二次谐波产生中结合几个单独的光学变换的结构来扩展非线性光子晶体的功能。特别是,我们在铁电体中采用全光自发极化反转来创建非线性全息图,该全息图具有非线性的弯曲叉状空间调制,用于生成二次谐波光学涡流。弯曲的叉状结构代表了标准涡旋谐波发生器(叉结构)和轴锥的组合,从而使我们能够实现二次谐波“完美涡旋”,其直径保持不变,独立于拓扑电荷。我们扩展了功能通过制造一种在二次谐波产生中结合几个单独的光学变换的结构来制造非线性光子晶体。特别是,我们在铁电体中采用全光自发极化反转来创建非线性全息图,该全息图具有弯曲的叉状非线性空间调制,用于生成二次谐波光学涡流。弯曲的叉状结构代表了标准涡旋谐波发生器(叉结构)和轴锥的组合,从而使我们能够实现二次谐波“完美涡旋”,其直径保持恒定,独立于拓扑电荷。
更新日期:2020-02-03
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