Phase contrast enhancement in microscopy using spiral phase filtering

Helical-wavefront laser beams produced with a spiral phaseplate

Marco W. Beijersbergen, R.P.C. Coerwinkel, M. Kristensen et al. · Optics Communications · 1994 · 1.6K citations

Natural Sciences, Materials Science, Optics +12

Optical vortices evolving from helicoidal integer and fractional phase steps

Marsha Berry · Journal of Optics A Pure and Applied Optics · 2004 · 719 citations

Natural Sciences, Physics, Condensed Matter Physics +10

Spiral phase contrast imaging in microscopy

Severin Fürhapter, Alexander Jesacher, Stefan Bernet et al. · Optics Express · 2005 · 644 citations · Full text

Natural Sciences, Biomedical Engineering, Physics +16

Observation of the vortex structure of a non-integer vortex beam

Jonathan Leach, Eric Yao, Miles J. Padgett · New Journal of Physics · 2004 · 377 citations · Full text

Natural Sciences, Physics, Optics +16

The Phase Rotor Filter

Svetlana N. Khonina, Victor V. Kotlyar, M.V. Shinkaryev et al. · Journal of Modern Optics · 1992 · 322 citations

Natural Sciences, Physics, Optical Materials +15