Active Two-Dimensional Steering of Radiation from a Nanoaperture.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 30372090.
- Also identified by DOI 10.1021/acs.nanolett.8b03319 and PMC identifier 6328275.
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Abstract
We experimentally demonstrate control over the direction of radiation of a beam that passes through a square nanoaperture 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 nanoaperture. Robust and stable steering of 9.5° in two orthogonal directions was achieved.