A three dimensional dark focal spot uniformly surrounded by light |
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| Authors: | Ná ndor Bokor,Nir Davidson |
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| Affiliation: | a Department of Physics, Budapest University of Technology and Economics, 1111 Budapest, Budafoki u.8., Hungary
b Department of Physics of Complex Systems, Weizmann Institute of Science, 76100 Rehovot, Israel |
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| Abstract: | A new technique is proposed for generating a tight dark focal spot surrounded by uniform light intensity in all directions. It is based on a single focusing lens illuminated from one side, hence the alignment sensitivities associated with 4π methods are eliminated. Such a beam can be useful, e.g. as a dark atomic trap, and as the erase beam in three dimensional super-resolution fluorescence microscopy. |
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