Strong absorption and selective emission from engineered metals with dielectric coatings

Streyer, W.; Law, Stephanie; Rooney, G.; Jacobs, Thomas; Wasserman, D.

doi:10.1364/oe.21.009113

Cited by 97 publications

(82 citation statements)

References 18 publications

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“…The superabsorber comprises a highly absorbing (large j) material and a transparent medium. We note, in passing that very recently compact absorbers in a planar geometry have been also reported by Kats et al 42 and Streyer et al 43 with designs that rely on the mutual optical properties of two lossy materials in the former work or a high index dielectric and an engineered metal of e $ À1 in the latter work. In our proposed compact design, the underlying mechanism is a PC effect, where absorption is facilitated by a reflectionless funneling to a photonic-crystal mode, with a highly lossy Floquet-Bloch phase.…”

Section: Practically Realizable Superabsorber Designssupporting

confidence: 54%

Compact photonic-crystal superabsorbers from strongly absorbing media

Devarapu

Foteinopoulou

2013

Journal of Applied Physics

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We present a route to near-perfect absorption in compact photonic-crystal (PC) structures constructed from strongly absorbing media that are typically highly reflective in bulk form. Our analysis suggests that the key underlying mechanism in such PC superabsorbers is the existence of a PC-band-edge reflectionless condition. Although the latter is by default uncharacteristic in photonic crystals, we propose here a clear recipe on how such condition can be met by tuning the structural characteristics of one-dimensional lossy PC structures. Based on this recipe, we constructed a realizable three-layer SiC-BaF 2 -SiC PC operating within the Reststrahlen band of SiC. We demonstrate near-perfect absorption in this prototype of total thickness smaller than k=3, where more than 90% of the impinging light is absorbed by the top deep-subwavelength layer of thickness $k=1100. We believe our study will inspire new photonic-crystal-based designs for extreme absorption harnessing across the electromagnetic spectrum. V C 2013 AIP Publishing LLC.

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Section: Practically Realizable Superabsorber Designssupporting

confidence: 54%

Compact photonic-crystal superabsorbers from strongly absorbing media

Devarapu

Foteinopoulou

2013

Journal of Applied Physics

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“…[13] More recently, several studies demonstrated strong resonant/absorptive characteristics from double-layer thin-film coatings [14,15] or metalinsulator-metal triple-layer [16,17] or multilayer [18,19] coatings in microwave, infrared (IR) spectrum and beyond. Particularly, in a recent work [14] [2,4,[20][21][22] spectral characteristics.…”

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confidence: 99%

Large-Area, Lithography-Free Super Absorbers and Color Filters at Visible Frequencies Using Ultrathin Metallic Films

2015

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Here, we propose and demonstrate large-area perfect absorbers and transmission filters that overcome difficulties associated with the nanofabrication using a lithography-free approach. We also utilize and benefit from the optical losses in metals in our optical filter designs. Our resonant optical filter design is based on a modified, asymmetric metal-insulator-metal (MIM) based Fabry-Perot cavity with plasmonic, lossy ultra-thin (~30 nm) metallic films used as the top metallic layer. We demonstrated a narrow bandwidth (~17 nm) super absorber with 97% maximum absorption with a performance comparable to nanostructure/nanoparticle-based super absorbers. We also investigated transmission (color) filters using ultra-thin metallic films, in which different

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“…Metasurfaces-based optics is an attractive alternative approach at these spectral regions which are used by thermal imagers. In addition, metasurfaces can be utilized for modifying the spectral properties of thermal emitters [104,105] with great potential for electric power generation from heat sources.…”

Section: Discussion Outlook and Challengesmentioning

confidence: 99%

Metasurfaces-based holography and beam shaping: engineering the phase profile of light

Scheuer

2016

Nanophotonics

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Abstract:The ability to engineer and shape the phase profile of optical beams is in the heart of any optical element. Be it a simple lens or a sophisticated holographic element, the functionality of such components is dictated by their spatial phase response. In contrast to conventional optical components which rely on thickness variation to induce a phase profile, metasurfaces facilitate the realization of arbitrary phase distributions using large arrays with subwavelength and ultrathin (tens of nanometers) features. Such components can be easily realized using a single lithographic step and is highly suited for patterning a variety of substrates, including nonplanar and soft surfaces. In this article, we review the recent developments, potential, and opportunities of metasurfaces applications. We focus primarily on flat optical devices, holography, and beam-shaping applications as these are the key ingredients needed for the development of a new generation of optical devices which could find widespread applications in photonics.

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Strong absorption and selective emission from engineered metals with dielectric coatings

Cited by 97 publications

References 18 publications

Compact photonic-crystal superabsorbers from strongly absorbing media

Compact photonic-crystal superabsorbers from strongly absorbing media

Large-Area, Lithography-Free Super Absorbers and Color Filters at Visible Frequencies Using Ultrathin Metallic Films

Metasurfaces-based holography and beam shaping: engineering the phase profile of light

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