Sub-diffraction focusing of light by aperiodic masks

Mostafavi S., NUTKU F., Eksioglu Y.

JOURNAL OF MODERN OPTICS, vol.69, no.21, pp.1214-1223, 2022 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 69 Issue: 21
  • Publication Date: 2022
  • Doi Number: 10.1080/09500340.2022.2159083
  • Journal Name: JOURNAL OF MODERN OPTICS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1214-1223
  • Istanbul University Affiliated: Yes

Abstract

Diffraction of a spherical wave through various types of 2D aperiodic hollow masks is investigated computationally. Unlike a periodic transmissive grating, an aperiodic hollow mask can focus light into a hotspot with sub-wavelength diameter. In this work, several types of 2D aperiodic hollow masks are investigated in the framework of sub-diffraction focusing of light and generating superoscillations at the hotspot region.