光子的轨道角动量(OAM).PDF

光子的轨道角动量(OAM) 讲解人 张乘风  Professor Les Allen Calculate AM from EM field  Angular-momentum of light  Spin angular momentum  Orbital angular momentum 光束生成  螺旋相位板 (SPP) A light beam can acquire OAM by crossing a spiral phase plate, with a inhomogeneous thickness The complex amplitude of incident beams The complex amplitude directly after the plate  全息图生成涡旋光束 A more convenient approach for generating OAM is based on using diffraction on a fork-like or pitchfork hologram.Holograms can be also generated dynamically under the control of a computer by using a spatial light modulator. Optics Letters 17 (3): 221  Pitch-Fork Hologram Modulator: phase Ref. PHD_2011 B.Jack  棱镜转化LG光束和HG光束 OAM can also be generated by converting Hermite-Gaussian beams into the Laguerre-Gaussian ones by using an astigmatic system with two well-aligned cylindrical lenses placed at a specific distance (see figure) in order to introduce a well-defined relative phase between horizontal and vertical Hermite-Gauss beams. 自旋和轨道角动量的力学效应 谢 谢