Far-field nanoscopy on a semiconductor quantum dot via a rapid-adiabatic-passage-based switch

Kaldewey, Timo and Kuhlmann, Andreas V. and Valentin, Sascha R. and Ludwig, Arne and Wieck, Andreas D. and Warburton, Richard J.. (2018) Far-field nanoscopy on a semiconductor quantum dot via a rapid-adiabatic-passage-based switch. Nature Photonics, 12 (2). pp. 68-72.

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The diffraction limit prevents a conventional optical microscope from imaging at the nanoscale. However, nanoscale imaging of molecules is possible by exploiting an intensity-dependent molecular switch1,2,3. This switch is translated into a microscopy scheme, stimulated emission depletion microscopy4,5,6,7. Variants on this scheme exist3,8,9,10,11,12,13, yet all exploit an incoherent response to the lasers. We present a scheme that relies on a coherent response to a laser. Quantum control of a two-level system proceeds via rapid adiabatic passage, an ideal molecular switch. We implement this scheme on an ensemble of quantum dots. Each quantum dot results in a bright spot in the image with extent down to 30 nm (λ/31). There is no significant loss of intensity with respect to confocal microscopy, resulting in a factor of 10 improvement in emitter position determination. The experiments establish rapid adiabatic passage as a versatile tool in the super-resolution toolbox.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Experimental Physics (Warburton)
UniBasel Contributors:Warburton, Richard J and Kaldewey, Timo and Kuhlmann, Andreas
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Springer Nature
Note:Publication type according to Uni Basel Research Database: Journal article
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edoc DOI:
Last Modified:24 Apr 2019 10:33
Deposited On:16 Apr 2019 08:59

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