Large parallelization of STED nanoscopy using optical lattices.

As a scanning microscope, STimulated Emission Depletion (STED) nanoscopy needs parallelization for fast wide-field imaging. Using well-designed optical lattices for depletion together with wide-field excitation and a fast camera for detection, we achieve large parallelization of STED nanoscopy. Wide field of view super-resolved images are acquired by scanning over a single unit cell of the optical lattice, which can be as small as 290 nm * 290 nm. Optical Lattice STED (OL-STED) imaging is demonstrated with a resolution down to 70 nm at 12.5 frames per second.