Tuning the fields focused by a high NA lens using spirally polarized beams(Invited Paper)  

作　　者：F.Wackenhut B.Zobiak A.J.Meixner A.V.Failla 

机构地区：[1]Eberhard Karls University Tübingen, Institute of Physical and Theoretical Chemistry [2]University Medical Center Hamburg-Eppendorf, UKE Microscopy Imaging Facility

出　　处：《Chinese Optics Letters》2017年第3期51-54,共4页中国光学快报（英文版）

摘　　要：We show the power of spirally polarized doughnut beams as a tool for tuning the field distribution in the focus of a high numerical aperture （NA） lens. Different and relevant states of polarization as well as field distributions can be created by the simple turning of a λ/2 retardation wave plate placed in the excitation path of a micro- scope. The realization of such a versatile excitation source can provide an essential tool for nanotechnology investigations and biomedical experiments.We show the power of spirally polarized doughnut beams as a tool for tuning the field distribution in the focus of a high numerical aperture （NA） lens. Different and relevant states of polarization as well as field distributions can be created by the simple turning of a λ/2 retardation wave plate placed in the excitation path of a micro- scope. The realization of such a versatile excitation source can provide an essential tool for nanotechnology investigations and biomedical experiments.

关 键 词：Tuning the fields focused by a high NA lens using spirally polarized beams HIGH 

分 类 号：TH74[机械工程—光学工程]