1 citations · 1 across the 9 of their papers we have counts for
9 papers
Antireflection by design in bilayer metasurfaces
Jaewon Oh, Davide Cassara, Alfonso Palmieri +5
Antireflection coatings are ubiquitous in optical systems, where they maximize transmission and suppress undesirable reflections by impedance-matching uniform interfaces. Extending…
Self-healing of the Montgomery pattern
Athena Xu, Oscar de Vries, Alfonso Palmieri +3
Self-healing -- the ability of a structured beam to reconstruct its transverse profile after partial obstruction -- has been demonstrated for diffraction-free beams, where the reco…
Silica meta-optics: When high-performance does not need a high-index
Luca Sacchi, Alfonso Palmieri, Vitthal Mishra +3
Metasurfaces -- planar arrays of subwavelength nanostructures -- are typically realized with high-index dielectrics, while low-index platforms are often dismissed for their weaker…
Observation of spatially structured Montgomery effect in free space
Murat Yessenov, Luca Sacchi, Alfonso Palmieri +3
We report the first direct observation of the spatially structured Montgomery effect, a lensless self-imaging phenomenon that generalizes the Talbot effect to aperiodic structures,…
Free-standing bilayer metasurfaces in the visible
Ahmed H. Dorrah, Joon-Suh Park, Alfonso Palmieri +1
Mult-layered meta-optics have enabled complex wavefront shaping beyond their single layer counterpart owing to the additional design variables afforded by each plane. For instance,…
Shape optimization for high efficiency metasurfaces: theory and implementation
P. Dainese, L. Marra, D. Cassara +7
Complex non-local behavior makes designing high efficiency and multifunctional metasurfaces a significant challenge. While using libraries of meta-atoms provide a simple and fast i…
Rotatum of Light
Ahmed H. Dorrah, Alfonso Palmieri, Lisa Li +1
Vortices are ubiquitous in nature and can be observed in fluids, condensed matter, and even in the formation of galaxies. Light, too, can evolve like a vortex. Optical vortices are…
Do bilayer metasurfaces behave as a stack of decoupled single-layer metasurfaces?
Alfonso Palmieri, Ahmed H. Dorrah, Jun Yang +3
Flat optics or metasurfaces have opened new frontiers in wavefront shaping and its applications. Polarization optics is one prominent area which has greatly benefited from the shap…
Metasurfaces for free-space coupling to multicore fibers
Jaewon Oh, Jun Yang, Louis Marra +4
Space-division multiplexing (SDM) with multicore fibers (MCFs) is envisioned to overcome the capacity crunch in optical fiber communications. Within these systems, the coupling opt…