Abruptly Autofocusing Twisted Optical Bottle Beams
You Wu, Zejia Lin, Chuangjie Xu, Danlin Xu, Haiqi Huang, Jiajia Zhao, Zhenwu Mo, Junjie Jiang, Haobin Yang, Liping Zhang, Hongzhan Liu, Dongmei Deng, Lingling Shui
Abstract
Versatile twisted optical bottles (TOBs) generated from a series of abruptly autofocusing beams are derived numerically and experimentally. This kind of TOB beam utilizes dual-autofocus, optical-vortex, and astigmatic phase properties to structure one or more three-dimensional closed dark regions, the bottle space. Closed off-axis multiple optical bottles are generated and observed experimentally. The twist angles can individually affect the rotation of the TOB. The experimental results agree well with our numerical simulations. The relationships between the astigmatic phase, the length of the TOB, the topological order of the vortex, and the width of the TOB are determined. Additionally, stable mesocarbon particles trapped by TOB beams are observed in side view successfully. These TOBs offer more possibilities to trap, sort, and clean microparticles or nanoparticles and improve optical manipulation systems in the future.