Digital plasmonic holography with iterative phase retrieval for sensing
Propagating surface plasmon waves have been used for many applications including imaging and sensing. However, direct in-plane imaging of micro-objects with surface plasmon waves suffers from the lack of simple, two-dimensional lenses, mirrors, and other optical elements. In this paper, we apply lensless digital holographic techniques and leakage radiation microscopy to achieve in-plane surface imaging with propagating surface plasmon waves. As plasmons propagate in two-dimensions and scatter from various objects, a hologram is formed over the surface. Iterative phase retrieval techniques applied to this hologram remove twin image interference for high-resolution in-plane imaging and enable further applications in real-time plasmonic phase sensing.
Physics and Engineering
Spies, Ryan M.; Cole, Grace H.; Engevik, Marit A.; Nordberg, Britta G.; Scharnick, Evan A.; Vliem, Isaac M.; Brolo, Alexandre G.; and Lindquist, Nathan C., "Digital plasmonic holography with iterative phase retrieval for sensing" (2021). Physics and Engineering Faculty Publications. 4.