Integrating Sphere Fourier Microscopy of Highly Directional Emission.

ABSTRACT: Accurately controlling light emission using nano- and microstructured lenses and antennas is an active field of research. Dielectrics are especially attractive lens materials due to their low optical losses over a broad bandwidth. In this work we measure highly directional light emission from patterned quantum dots (QDs) aligned underneath all-dielectric nanostructured microlenses. The lenses are designed with an evolutionary algorithm and have a theoretical directivity of 160. The fabricated structures demonstrate an experimental full directivity of 61 ± 3, three times higher than what has been estimated before, with a beaming half-angle of 2.6°. This high value compared to previous works is achieved via three mechanisms. First, direct electron beam patterning of QD emitters and alignment

SUBMITTER: van der Burgt JS 

PROVIDER: S-EPMC8155557 | biostudies-literature | 2021 Apr

REPOSITORIES: biostudies-literature