论文标题
具有低阶时空耦合的超短辐射激光脉冲的聚焦场
Focused fields of ultrashort radially-polarized laser pulses having low-order spatio-temporal couplings
论文作者
论文摘要
我们介绍了具有低阶时空耦合（STC）的超短辐射激光束（RPLB）焦点周围的田间和传播特征的详细研究。考虑的三个STC是将不同频率的聚焦到沿纵向坐标的不同位置的聚焦，将频率聚焦到沿一个横向坐标的不同位置，以及具有幂律频率依赖性的光束腰部或雷利范围。考虑的STC被认为是低端的，因为它们通常是线性的。低阶矢量束，超短脉冲持续时间和三种不同的STC的组合显示出对介电或带电颗粒操纵以及潜在的其他强场现象中外在应用的希望。呈现的STC均在标准频域模型中开发，其中每种情况都涉及不同的彩色项。我们介绍了RPLB的向量性质所独有的结果，并将它们与线性极化的情况进行了比较，从而为围绕焦点的电场提供了机会，并具有额外的极化元素。
We present a detailed study of the fields and propagation characteristics around the focus of ultrashort radially-polarized laser beams (RPLBs) having low-order spatio-temporal couplings (STCs). The three STCs considered are the focusing of the different frequencies to different positions along the longitudinal coordinate, the focusing of the frequencies to different positions along one transverse coordinate, and the beam waist or Rayleigh range having a power-law frequency dependence. The STCs considered are deemed low-order because they are generally linear in frequency. The combination of a low-order vector beam, ultrashort pulse duration, and the three different STCs shows promise for exotic applications in dielectric or charged particle manipulation and potentially other strong-field phenomena. The STCs presented are all developed in a standard frequency-domain model where each case involves a different chromatic term. We present the results unique to the vector nature of the RPLBs and compare them to the linearly polarized cases, opening up opportunities for control of the electric field around the focus with the additional element of polarization.
