Active Two-Dimensional Steering of Radiation from a Nanoaperture

Laura S. Dreissen, Hugo F. Schouten, Wim Ubachs, Shreyas B. Raghunathan, Taco D. Visser*

*Corresponding author for this work

Research output: Contribution to JournalArticleAcademicpeer-review

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.

Original languageEnglish
Pages (from-to)7207-7210
Number of pages4
JournalNano Letters
Volume18
Issue number11
DOIs
Publication statusPublished - 14 Nov 2018

Keywords

  • diffraction
  • guided modes
  • Nanoapertures
  • optical switch
  • radiation steering

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