Optical nanoscopy with excited state saturation at liquid helium temperatures

Abstract : Optical resolution of solid-state single quantum emitters at the nanometre scale is a challenging step towards the control of delocalized states formed by strongly and coherently interacting emitters. We have developed a simple super-resolution optical microscopy method operating at cryogenic temperatures, which is based on optical saturation of the excited state of single fluorescent molecules with a doughnut-shaped beam. Sub-10 nm resolution is achieved with extremely low excitation intensities, a million times lower than those used in room-temperature stimulated emission depletion microscopy. Compared with super-localization approaches, our technique offers a unique opportunity to super-resolve single molecules with overlapping optical resonance frequencies and paves the way to the study of coherent interactions between single emitters and to the manipulation of their degree of entanglement.
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Nature Photonics, Nature Publishing Group, 2015, 〈10.1038/nphoton.2015.152〉
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Bin Yang, Jean-Baptiste Trebbia, Reenu Baby, Philippe Tamarat, Brahim Lounis. Optical nanoscopy with excited state saturation at liquid helium temperatures. Nature Photonics, Nature Publishing Group, 2015, 〈10.1038/nphoton.2015.152〉. 〈hal-01359111〉

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