Shaping Field Gradients for Nanolocalization

29 Sep 2019 Nechayev Sergey Eismann Jörg S. Neugebauer Martin Banzer Peter

Deep sub-wavelength localization and displacement sensing of optical nanoantennas have emerged as extensively pursued objectives in nanometrology, where focused beams serve as high-precision optical rulers while the scattered light provides an optical readout. Here, we show that in these schemes using an optical excitation as a position gauge implies that the sensitivity to displacements of a nanoantenna depends on the spatial gradients of the excitation field... (read more)

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