Formation of a three-dimensional bottle beam via an engineered microsphere  

作　　者：YAN ZHOU MINGHUI HONG 

机构地区：[1]Department of Electrical and Computer Engineering,National University of Singapore,Singapore 117576,Singapore

出　　处：《Photonics Research》2021年第8期1598-1606,共9页光子学研究（英文版）

基　　金：Ministry of Education—Singapore(MOE2019-T2-2-147)。

摘　　要：In this work,we propose a novel approach to produce three-dimensional(3 D)optical trapping with subwavelength size through an engineered microsphere,under linear polarization states of an incident light.The engineered microsphere is designed to contain the segmented regions of diffractive patterns and made by focused ion beam fabrication.We simulate and experimentally characterize the focus performance of the engineered microsphere.The emitted light field from the exit surface of the engineered microsphere forms a pair of axially arranged focused beams,and they are connected with a continuous optical field embracing a 3 D optical null at the center,forming the so-called optical bottle beam.Experimental results and numerical simulation are in good agreement.Such micro-optics can be used for precise and localized optical trapping.

关 键 词：BEAM TRAPPING DIMENSIONAL 

分 类 号：TN25[电子电信—物理电子学]