【摘 要】
：
It is widely accepted that an off-axis noncanonical vortex moves across the free-space diffracting Gaussian beam without rotation.But our analysis shows that th
【机 构】
：
Jiangsu Key Laboratory of Power Transmission and Distribution Equipment Technology, Hohai University
论文部分内容阅读
It is widely accepted that an off-axis noncanonical vortex moves across the free-space diffracting Gaussian beam without rotation.But our analysis shows that the vortex swirls a while before it approaches infinite.By neglecting the divergence of the host beam,we focus on this rotation characteristics of the vortices in linear homogeneous media.For the symmetrical host beam,it is found that the vortex moves along an elliptical trajectory,while the topological charge and the angular momentum of the vortex core relative to the beam axis are conserved.For the asymmetrical host beam,the vortex trajectory is rather complicated,since the noncanonical parameter varies as the light propagates,resulting in topological charge inversion.But we find that the vortices are always confined in a rectangular area,and the rotation direction is determined by the topological charge.
其他文献
With the increasing interest in Cu2O-based devices for photovoltaic applications,the energy band alignment at the Cu2O/ZnO heterojunction has received more and
Dynamic nature of hydrogen bond (H-bond) is central in molecular science of substance transportation, energy trans-fer, and phase transition in H-bonding networ
Quantum theory of surface plasmons is very important for studying the interactions between light and different metal nanostructures in nanoplasmonics.In this wo
The influences of the substituent base position on the excited state intramolecular proton transfer fluorescence prop-erties were explored in 2-(2’-hydroxyphen
白灵菇以其味道鲜美，风味独特和较高的食药用价值而著称，是一种市场前景广阔的珍稀食用菌。但是，育种工作较少，所以要通过诱变育种获得优质，高产，适应性强的白灵菇菌株是当今研究的
人民武装警察部队四川省总队三支队机炮中队副指导员李治林,一九八一年元月开始从事业余新闻报道以来,刻苦钻研新闻理论和采访知识,积极为报刊、电台写稿,宣传党的路线、方
Two types of enhancement-mode (E-mode) AlGaN/GaN metal-insulator-semiconductor high-electron-mobility transistors (MIS-HEMTs) with different gate insulators are
编辑同志: 一九八六年六月,《四川日报》、四川电视台等新闻单位相继派出记者,随我国长江科学考察漂流探险队采访。几个月来,随队记者们克服重重艰难险阻,及时
Editorial C
白灵菇(Pleurotus nebrodensis)又名白灵侧耳、阿魏菇,肉质鲜美、风味独特,是一种营养、药用价值极高的珍惜食药用真菌,市场前景广阔,极具开发潜力。但由于白灵菇栽培品种退
Uniform precession dynamics and its magnetic damping are investigated in epitaxial Co2Fel-xMnxA1 films by using the time-resolved magneto-optical Kerr effect un