Palangyos Dina C, Guerrero Raphael A
Department of Physics, School of Science and Engineering, Ateneo de Manila University, Loyola Heights, Quezon City 1108, Philippines.
Math and Natural Sciences Department, College of Computing, Pangasinan State University San Vicente, Urdaneta City 2428, Philippines.
Micromachines (Basel). 2023 Aug 15;14(8):1609. doi: 10.3390/mi14081609.
Various methods have been employed to produce Bessel beams (BBs), with axicon-based techniques remaining the most efficient. Among the limitations of axicons are manufacturing defects such as oblate tips and difficulty in tuning the generated BBs. In this work, we combine the effect of a blunt-tip axicon with refraction using various combinations of liquid media to generate variable BB intensity profiles. The output BBs from the axicon are made to pass through a custom-built fluid chamber and magnified using a telescope system. When traversing an empty chamber, the Bessel beam core diameter is measured to be 773.8 µm at propagation distance ' = 30 cm. The core diameter increases as the beam passes through a chamber containing different liquids as a result of an effective axicon-telescope distance produced by the indices of refraction of the pertinent fluids. Bessel beams modified by the fluid chamber maintain the properties of non-diffraction and self-healing.
人们已经采用了各种方法来产生贝塞尔光束（BBs），基于轴棱锥的技术仍然是最有效的。轴棱锥的局限性包括制造缺陷，如扁平尖端以及难以调节所产生的贝塞尔光束。在这项工作中，我们将钝尖轴棱锥的效果与使用各种液体介质组合的折射相结合，以产生可变的贝塞尔光束强度分布。使轴棱锥输出的贝塞尔光束通过一个定制的流体腔，并使用望远镜系统进行放大。当穿过一个空的腔室时，在传播距离' = 30 cm处测得贝塞尔光束的核心直径为773.8 µm。由于相关流体的折射率产生了有效的轴棱锥 - 望远镜距离，当光束穿过装有不同液体的腔室时，核心直径会增大。由流体腔室修改后的贝塞尔光束保持了无衍射和自愈的特性。
