title: New design method for a phase plate in super-resolution fluorescence microscopy.
abstract: The performance of a super-resolution fluorescence depletion microscope system depends crucially on the precise alignment of the pump and erase beams with the axis of the focusing objective. Here, we propose a new design method for a two-color spiral phase plate with a single-layer structure (S2SPP), and we experimentally investigate the image properties given by the phase plate. In spite of its simple structure, the plate can provide a super-resolution image with a spatial resolution better than 70 nm. Beside eliminating alignment problems and yielding a compact setup, the simplicity of fabrication of the S2SPP makes our proposed method very suitable for commercial microscope systems.
authors.affiliation: Department of Physics, Budapest University of Technology and Economics, Budafoki u. 8., Budapest 1111, Hungary.
authors.forename: Nandor
authors.initials: N
authors.lastname: Bokor
authors.forename: Yoshinori
authors.initials: Y
authors.lastname: Iketaki