Journal article
Transmission Microscopy with Nanometer Resolution Using a Deterministic Single Ion Source



Publication Details
Authors:
Jacob, G.; Groot-Berning, K.; Wolf, S.; Ulm, S.; Couturier, L.; Dawkins, S.; Poschinger, U.; Schmidt-Kaler, F.; Singer, K.
Publication year:
2016
Journal:
Physical Review Letters
Pages range:
043001
Journal acronym:
PRL
Volume number:
117
ISSN:
0031-9007
eISSN:
1079-7114

Abstract


We realize a single particle microscope by using deterministically extracted laser-cooled Ca+40 ions from a Paul trap as probe particles for transmission imaging. We demonstrate focusing of the ions to a spot size of 5.8±1.0nm and a minimum two-sample deviation of the beam position of 1.5 nm in the focal plane. The deterministic source, even when used in combination with an imperfect detector, gives rise to a fivefold increase in the signal-to-noise ratio as compared with conventional Poissonian sources. Gating of the detector signal by the extraction event suppresses dark counts by 6 orders of magnitude. We implement a Bayes experimental design approach to microscopy in order to maximize the gain in spatial information. We demonstrate this method by determining the position of a 1μm circular hole structure to a precision of 2.7 nm using only 579 probe particles.




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