Spatial coherence control and analysis via micromirror-based mixed-state ptychography. (13th May 2021)

• Record Type: Journal Article
• Authors: Röhrich, Ruslan; Koenderink, A Femius; Witte, Stefan; Loetgering, Lars
• Is Part Of: New journal of physics. Volume 23:Number 5(2021)
• Publication Date: 2021-05-13
• Subjects: coherence -- ptychography -- inverse modeling -- computational imaging -- wavefront sensing; Physics -- Periodicals; Physics; Periodicals; 530.05
• DOI: 10.1088/1367-2630/abf389
• Languages: English
• ISSNs: 1367-2630

Abstract

Abstract: Flexible and fast control of the phase and amplitude of coherent light, enabled by digital micromirror devices (DMDs) and spatial light modulators, has been a driving force for recent advances in optical tweezers, nonlinear microscopy, and wavefront shaping. In contrast, engineering spatially partially coherent light remains widely elusive due to the lack of tools enabling a joint analysis and control sequence. Here, we report an approach to coherence engineering that combines a quasi-monochromatic, thermal source and a DMD together with a ptychographic scanning microscope. The reported method opens up new routes to low-cost coherence control, with applications in micromanipulation, nanophotonics, and quantitative phase contrast imaging.