Abstract
We fabricate a two-color annular hybrid wave plate (TAHWP) for fluorescence depletion super-resolution microscopy by combining quartz plates. Inserting the TAHWP into a commercial laser-scanning microscope together with a quarter-wave plate creates a three-dimensional spherical fluorescence spot smaller than the diffraction limit. Since a simple experimental setup easily provides a spot with a volume of , the TAHWP can improve the performance of various microspectroscopic devices.
© 2015 Optical Society of America
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