2D and 3D sub-diffraction source imaging with a superoscillatory filter

Opt Express. 2013 Apr 8;21(7):8142-56. doi: 10.1364/OE.21.008142.

Abstract

In this paper, we propose an approach to overcome the well-known "diffraction limit" when imaging sources several wavelengths away. We employ superdirectivity antenna concepts to design a well-controlled superoscillatory filter (SOF) based on the properties of Tschebyscheff polynomials. The SOF is applied to the reconstructed images from holographic algorithms which are based on the back-propagation principle. We demonstrate the capability of this approach when imaging point-sources several wavelengths away in one-, two-, and three-dimensional imaging with super-resolution. We also investigate the robustness of the proposed algorithm with the sharpness of the SOF, the presence of noise, the imaging distance, and the size of the scanning aperture.

MeSH terms

  • Equipment Design
  • Equipment Failure Analysis
  • Filtration / instrumentation*
  • Imaging, Three-Dimensional / instrumentation*
  • Light
  • Oscillometry / instrumentation*
  • Refractometry / instrumentation*