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Focusing and propagation properties of Bessel-Gaussian beam with a power-order mixing helical-conical phase wavefront

机译：电源混合螺旋相位波前的贝塞尔高斯梁的聚焦和传播特性

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摘要

Based on the vector diffraction theory, this paper investigates the focusing and propagation characteristics of a Bessel-Gaussian beam with a power-order mixing helical-conical wavefront. It discusses the focused light intensity, optical gradient force distribution, and propagation characteristics under different parameters in detail. The results show that the topological charge number L can finely adjust the opening of the spiral-like curve at the focal plane. The power order n can adjust the energy distribution in the focus area. By increasing the eccentricity parameters K, the position of the maximum intensity spot will move along with they coordinate axis. When the beam parameter beta increases, the number of intensity peaks on the focal plane increases. As the propagation distance z increases, the pattern of intensity distribution will change from an ellipse to "doughnut-like." Then a circular dark core will appear in the center of the light, and the propagation mode will gradually become an optical trap. Some optical gradient force distributions also are investigated to illuminate the applications of these alterable focal patterns. (C) 2021 Optical Society of America
机译：基于矢量衍射理论，研究了功率阶混合螺旋锥波前贝塞尔-高斯光束的聚焦和传输特性。详细讨论了不同参数下的聚焦光强、光学梯度力分布和传输特性。结果表明，拓扑电荷数L可以很好地调节焦平面螺旋曲线的开口。功率阶数n可以调节聚焦区域的能量分布。通过增加偏心参数K，最大强度点的位置将沿坐标轴移动。当光束参数β增加时，焦平面上的强度峰值数量增加。随着传播距离z的增加，强度分布模式将从椭圆变为“甜甜圈状”然后在光的中心会出现一个圆形的暗核，传播模式将逐渐变成一个光学陷阱。还研究了一些光学梯度力分布，以说明这些可变焦斑图的应用。（2021）美国光学学会

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  • 来源
    《Applied optics》 |2021年第4期|共6页
  • 作者

    Chen Yueyang; Li Jinsong; Zhang Haoran; Xu Yang; Gao Xiumin;

  • 作者单位

    China Jiliang Univ Coll Opt &

    Elect Hangzhou 310018 Peoples R China;

    China Jiliang Univ Coll Opt &

    Elect Hangzhou 310018 Peoples R China;

    China Jiliang Univ Coll Opt &

    Elect Hangzhou 310018 Peoples R China;

    China Jiliang Univ Coll Opt &

    Elect Hangzhou 310018 Peoples R China;

    Univ Shanghai Sci &

    Technol Shanghai 200093 Peoples R China;

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  • 正文语种 eng
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