Chinese Optics Letters, 2017, 15 (3): 030013, Published Online: Jul. 25, 2018
Tuning the fields focused by a high NA lens using spirally polarized beams (Invited Paper) Download: 698次
Abstract
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 microscope. The realization of such a versatile excitation source can provide an essential tool for nanotechnology investigations and biomedical experiments.
F. Wackenhut, B. Zobiak, A. J. Meixner, A. V. Failla. Tuning the fields focused by a high NA lens using spirally polarized beams (Invited Paper)[J]. Chinese Optics Letters, 2017, 15(3): 030013.