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arXiv · 1812.03741

Active Two-dimensional Steering of Radiation from a Nano-Aperture

Laura S. Dreissen·Hugo F. Schouten·Wim Ubachs·Shreyas B. Raghunathan·Taco D. Visser
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Abstract

We experimentally demonstrate control over the direction of radiation of a beam that passes through a square nano-aperture in a metal film. The ratio of the aperture size and the wavelength is such that only three guided modes, each with different spatial symmetries, can be excited. Using a spatial light modulator, the superposition of the three modes can be altered, thus allowing for a controlled variation of the radiation pattern that emanates from the nano-aperture. Robust and stable steering of 9.5 degree in two orthogonal directions was achieved.

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Laura S. Dreissen, Hugo F. Schouten, Wim Ubachs, Shreyas B. Raghunathan, Taco D. Visser. 2018-12-10. Active Two-dimensional Steering of Radiation from a Nano-Aperture. https://doi.org/10.1021/acs.nanolett.8b03319

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