High focusing efficiency terahertz lens based on Huygens metasurface
Sign Up to like & getrecommendations! Published in 2021 at "Journal of Nanophotonics"
DOI: 10.1117/1.jnp.15.026011
Abstract: Abstract. We propose an ultra-thin Huygens lens with high focusing efficiency and robustness that is composed of a unit cell with a pair of C-shaped split-ring resonators (CSRRs). Compared with the single-layer CSRR lens, the… read more here.
Keywords: efficiency terahertz; focusing efficiency; high focusing; huygens metasurface ... See more keywords
Design of a vortex metalens with high focusing efficiency using propagation phase.
Sign Up to like & getrecommendations! Published in 2022 at "Applied optics"
DOI: 10.1364/ao.464090
Abstract: Three vortex-focused beams are produced with linearly polarized light along the x or y axis at a wavelength of 1550 nm. First, a polarization-independent vortex metalens with a topological charge of three and focal length… read more here.
Keywords: vortex metalens; efficiency; design vortex; focusing efficiency ... See more keywords
Dielectric longitudinal bifocal metalens with adjustable intensity and high focusing efficiency.
Sign Up to like & getrecommendations! Published in 2019 at "Optics express"
DOI: 10.1364/oe.27.000680
Abstract: Metalens recently attracts enormous attention due to its microscale figure and versatile functionalities. With the combination of geometric phase and propagation phase, we first wrote the phase equation of bifocal metalens that can high efficiently… read more here.
Keywords: bifocal metalens; two foci; intensity; dielectric longitudinal ... See more keywords
Upper bounds on focusing efficiency.
Sign Up to like & getrecommendations! Published in 2022 at "Optics express"
DOI: 10.1364/oe.472558
Abstract: Upper bounds on the focusing efficiency of aperture fields and lens systems are formulated using integral equation representations of Maxwell's equations and Lagrangian duality. Two forms of focusing efficiency are considered based on lens exit… read more here.
Keywords: upper bounds; aperture fields; bounds focusing; efficiency ... See more keywords