Generation of Tamm Plasmon Resonances for Light Confinement Applications in Narrowband Gradient-Index Filters Based on Nanoporous Anodic Alumina
Sign Up to like & getrecommendations! Published in 2023 at "ACS Applied Nano Materials"
DOI: 10.1021/acsanm.2c05356
Abstract: Gold-coated gradient-index filters based on nanoporous anodic alumina (Au-coated NAA–GIFs) were used as model platforms to elucidate how Tamm plasmons can be tailored by engineering the geometric features of the plasmonic and photonic components of… read more here.
Keywords: filters based; gradient index; index filters; tamm ... See more keywords
Flat acoustics with soft gradient-index metasurfaces
Sign Up to like & getrecommendations! Published in 2019 at "Nature Communications"
DOI: 10.1038/s41467-018-07990-5
Abstract: Recently, metasurfaces have been proven to be effective and compact devices for the design of arbitrary wavefronts. Metasurfaces are planar metamaterials with a subwavelength thickness that allows wavefront shaping by introducing in-plane variations, namely, gradients,… read more here.
Keywords: acoustics; soft gradient; index; metasurfaces flat ... See more keywords
Partitioned gradient-index phononic crystals for full phase control
Sign Up to like & getrecommendations! Published in 2020 at "Scientific Reports"
DOI: 10.1038/s41598-020-71397-w
Abstract: Gradient-index phononic crystals (GRIN-PC), characterized by layers with spatially changing refractive indices, have recently been investigated as part of the effort to realize flat lenses in acoustic and elastic regimes. Such gradient-index lens must be… read more here.
Keywords: partitioned gradient; phase; index; index phononic ... See more keywords
Realization of high-quality optical nanoporous gradient-index filters by optimal combination of anodization conditions.
Sign Up to like & getrecommendations! Published in 2020 at "Nanoscale"
DOI: 10.1039/c9nr10526c
Abstract: High-quality nanoporous anodic alumina gradient-index filters (NAA-GIFs) are realized by sinusoidal pulse anodisation (SPA) of aluminum. A three-level factorial design of experiments is used to determine the effect of three critical anodization parameters -electrolyte temperature,… read more here.
Keywords: quality; index filters; high quality; naa gifs ... See more keywords
Gradient-Index Granular Crystals: From Boomerang Motion to Asymmetric Transmission of Waves.
Sign Up to like & getrecommendations! Published in 2019 at "Physical review letters"
DOI: 10.1103/physrevlett.123.214301
Abstract: We present a gradient-index crystal that offers extreme tunability in terms of manipulating the propagation of elastic waves. For small-amplitude excitations, we achieve control over wave transmission depth into the crystal. We numerically and experimentally… read more here.
Keywords: gradient index; granular crystals; index granular; transmission ... See more keywords
Special Section Guest Editorial: Advances in Gradient Index Optics Technology
Sign Up to like & getrecommendations! Published in 2020 at "Optical Engineering"
DOI: 10.1117/1.oe.59.11.112601
Abstract: Abstract. This guest editorial introduces the Special Section on Advances in Gradient Index Optics Technology. read more here.
Keywords: special section; guest editorial; index optics; advances gradient ... See more keywords
Gradient-index Alvarez lenses.
Sign Up to like & getrecommendations! Published in 2023 at "Applied optics"
DOI: 10.1364/ao.487089
Abstract: Gradient-index Alvarez lenses (GALs), a new, to the best of our knowledge, type of freeform optical component, are surveyed in this work for their unique properties in generating variable optical power. GALs display similar behavior… read more here.
Keywords: index; gradient index; power; index alvarez ... See more keywords
Tunable thermally induced gradient index for extended depth of field.
Sign Up to like & getrecommendations! Published in 2018 at "Applied optics"
DOI: 10.1364/ao.57.000e71
Abstract: Extended depth of field (EDoF) imaging remains desirable in the consumer market due to its reduced cost through omission of refocusing hardware. This paper describes the study of a heated plastic plate and its effect… read more here.
Keywords: depth field; field; extended depth; plate ... See more keywords
Propagation of a Bessel-Gaussian beam in a gradient-index medium.
Sign Up to like & getrecommendations! Published in 2019 at "Applied optics"
DOI: 10.1364/ao.58.000920
Abstract: Based on the ABCD matrix method and Collins diffraction integral formula, analytical expression for Bessel-Gaussian beam propagation in a gradient-index medium is derived. The propagation trajectory, intensity, and phase distributions of the zeroth-order, second-order, and… read more here.
Keywords: index medium; propagation; beam; gaussian beam ... See more keywords
Gradient-index optical fiber lens for efficient fiber-to-chip coupling.
Sign Up to like & getrecommendations! Published in 2017 at "Optics express"
DOI: 10.1364/oe.25.013035
Abstract: A gradient-index optical fiber lens is proposed and fabricated on the tip of a single-mode fiber using focused ion beam milling. Second-order effective medium theory is used to design a gradual change in the fill… read more here.
Keywords: index; optical fiber; fiber lens; fiber ... See more keywords
Electrically tunable gradient-index lenses via nematic liquid crystals with a method of spatially extended phase distribution.
Sign Up to like & getrecommendations! Published in 2019 at "Optics express"
DOI: 10.1364/oe.27.032398
Abstract: The dilemma between tunable range of a lens power and an aperture size in gradient-index (GRIN) type of liquid crystal (LC) lenses is well known due to the limitation of birefringence of LC martials and… read more here.
Keywords: electrically tunable; grin lens; liquid; via nematic ... See more keywords