Dielectric resonator nanoantennas at visible frequencies
Year: 2013
Type: article
Abstract: Drawing inspiration from radio-frequency technologies, we propose a realization of nano-scale optical dielectric resonator antennas (DRAs) functioning in their fundamental mode. These DRAs operate via displacement current in a low-loss high-permittivity dielectric, resulting in reduced energy dissipation in the resonators. The designed nonuniform planar DRA array on a metallic plane imparts a sequence of phase shifts across the wavefront to create beam deflection off the direction of specular reflection. The realized array clearly demonstrates beam deflection at 633 nm. Despite the loss introduced by field interaction with the metal substrate, the proposed low-loss resonator concept is a first step towards nanoantennas with enhanced efficiency. The compact planar structure and technologically relevant materials promise monolithic circuit integration of DRAs.
Source: Optics Express
DOI: 10.1364/oe.21.001344
Institutions: The University of Adelaide, RMIT University
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,270
Awards: Unconventional antennas from macro- to nano-scales, Terahertz Metamaterials for Molecular Sensing, Molecular spectroscopic 2D and 3D imaging systems at sub-micron spatial resolution, Complementary metal–oxide–semiconductor (CMOS) -compatible ultra-high response piezoelectric thin films for efficient energy harvesting, G697918568, Dynamic substrates for surface-enhanced Raman scattering: piezoelectric actuated nanotextures with phase-locked signal processing
OpenAlex ID: W2015673695