Fractal spiral zone plate with high-order harmonics suppression

Zang Huaping; Ding Shuangling; Wei Lai; Wang Chuanke; Fan Quanping; Cao Leifeng

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Fractal spiral zone plate with high-order harmonics suppression

机译：具有高阶谐波抑制的分形螺旋区板

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We extend the concept of fractal spiral zone plates and define a new family of Cantor sequence spiral zone plates (CSSZPs) by removing the interference of high-order harmonics. In this typical design, apart from combining the spiral zone plates and Cantor fractal structure together, the desired physical properties have been realized by using a two-parameter modified sinusoidal apodization window along the azimuthal direction to eliminate the high-order harmonics. Numerical simulation reveals that the intensity of high diffraction orders of the CSSZPs can be effectively suppressed by at least 3 orders of magnitude, while the shapes of the sequences of focused optical vortices surrounding the first primary focal length are maintained, similar to those of the fractal spiral zone plates. The demonstration experiment, based on a spatial light modulator, has been also carried out to confirm the desired characteristics. This new kind of diffractive elements may offer potential alternatives for 3D optical tweezers, optical imaging, and lithography. (C) 2019 Optical Society of America

机译：我们扩展了分形螺旋区板的概念，通过去除高阶谐波的干扰来界定新的Cantor序列螺旋区板（CSSZPS）。在这种典型的设计中，除了将螺旋区板和陈列配分形结构组合在一起之外，还通过使用沿方位角方向的双参数修改的正弦缩小窗口来实现所需的物理性质，以消除高阶谐波。数值模拟显示，可以有效地抑制CSSZPS的高衍射令的强度至少3个级，而围绕第一初级焦距的聚焦光学涡流的序列的形状保持，类似于分形螺旋区板材。还已经进行了基于空间光调制器的示范实验，以确认所需的特性。这种新的衍射元件可以为3D光学镊子，光学成像和光刻提供潜在的替代方案。（c）2019年光学学会

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来源
《Applied optics》 |2019年第31期|共7页
作者
Zang Huaping; Ding Shuangling; Wei Lai; Wang Chuanke; Fan Quanping; Cao Leifeng;
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Zhengzhou Univ Sch Phys &

Engn Zhengzhou 450001 Henan Peoples R China;

Zhengzhou Univ Sch Phys &

Engn Zhengzhou 450001 Henan Peoples R China;

CAEP Natl Key Lab Laser Fus Res Ctr Laser Fus Mianyang 621900 Sichuan Peoples R China;

CAEP Natl Key Lab Laser Fus Res Ctr Laser Fus Mianyang 621900 Sichuan Peoples R China;

CAEP Natl Key Lab Laser Fus Res Ctr Laser Fus Mianyang 621900 Sichuan Peoples R China;

CAEP Natl Key Lab Laser Fus Res Ctr Laser Fus Mianyang 621900 Sichuan Peoples R China;

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Fractal spiral zone plate with high-order harmonics suppression

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