We propose a method to obtain nano-scale 3D super resolution in STED fluorescence microscopy. A double-ring-shaped cylindrical vector vortex beam, with an appropriate vortex angle and a proper truncation parameter of the beam, is used to generate a 3D dark spot as the erase spot. A single-ring-shaped radially polarized beam is used as a pump beam, which can generate a sharper 3D bright spot. The volume of the generated 3D dark spot is small and the uniformity of the light wall surrounding the spot is quite high. Consequently, the 3D super-resolution ability of a STED microscope is improved and nano-scale three-dimensional resolutions are obtained.
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Univ Chinese Acad Sci, Dept Mat & Optoelect, Beijing 100049, Peoples R China
Chinese Acad Sci, Inst Opt & Elect, Chengdu 610209, Peoples R ChinaUniv Chinese Acad Sci, Dept Mat & Optoelect, Beijing 100049, Peoples R China
Xie, Zhongye
Hu, Song
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Chinese Acad Sci, Inst Opt & Elect, Chengdu 610209, Peoples R ChinaUniv Chinese Acad Sci, Dept Mat & Optoelect, Beijing 100049, Peoples R China
Hu, Song
Tang, Yan
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Chinese Acad Sci, Inst Opt & Elect, Chengdu 610209, Peoples R ChinaUniv Chinese Acad Sci, Dept Mat & Optoelect, Beijing 100049, Peoples R China
Tang, Yan
Liu, Xi
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Chinese Acad Sci, Inst Opt & Elect, Chengdu 610209, Peoples R ChinaUniv Chinese Acad Sci, Dept Mat & Optoelect, Beijing 100049, Peoples R China
Liu, Xi
Liu, Junbo
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Chinese Acad Sci, Inst Opt & Elect, Chengdu 610209, Peoples R ChinaUniv Chinese Acad Sci, Dept Mat & Optoelect, Beijing 100049, Peoples R China
Liu, Junbo
He, Yu
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Chinese Acad Sci, Inst Opt & Elect, Chengdu 610209, Peoples R ChinaUniv Chinese Acad Sci, Dept Mat & Optoelect, Beijing 100049, Peoples R China