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Pushing forward the limit of nanometrology is a challenge, which is important both fundamentally and application-wise. Recently, we have experimentally demonstrated localisation precision down to few angstroms with sub-angstrom accuracy. This was possible by carefully structuring the individual components of the excitation field, thus obtaining a strong position dependent directional scattering from the nanoparticle, also known as transverse Kerker scattering.
References:
A. Bag, M. Neugebauer, P. Woźniak, G. Leuchs, and P. Banzer, Phys. Rev. Lett. 121, 193902 (201
M. Neugebauer, P. Woźniak, A. Bag, G. Leuchs, and P. Banzer, Nat. Commun. 7:11286 (2016)
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