Results 11 to 20 of about 364,421 (306)

Polarization Selective Broad/Triple Band Absorber Based on All-Dielectric Metamaterials in Long Infrared Regime

open access: yesPhotonics, 2023
In this paper, a polarization selective broad/triple-band metamaterial absorber based on SiO2 all-dielectric is designed and studied. The absorber works in a long infrared band (8–14 μm).
Haotian Zou   +5 more
doaj   +1 more source

Tunable Terahertz Absorber Based on Hexagonal Graphene Disk Array [PDF]

open access: yesJournal of Optoelectronical Nanostructures, 2023
:In this paper, a tunable absorber structure based on a graphene hexagonal array in the terahertz range is investigated. The graphene hexagonal absorber is simulated by the finite element method.
Sajad Ghajarpour-Nobandegani   +2 more
doaj   +1 more source

Reconfigurable Chiral Metasurface Absorbers Based on Liquid Crystals

open access: yesIEEE Photonics Journal, 2018
We propose a liquid-crystal-based reconfigurable chiral metasurface absorber and numerically investigate its chiro-optical properties. The chiral metasurface absorber consists of a metal–insulator–metal structure with the substrate, which ...
Shengtao Yin   +9 more
doaj   +1 more source

Design and modeling of photonic crystal Absorber by using Gold and graphene films [PDF]

open access: yesJournal of Optoelectronical Nanostructures, 2022
A novel absorber based on a one-dimensional photoniccrystal (PhC) is proposed by combining the absorptionproperty of gold and graphene films. We designed twophotonic crystals consisting of silicon and silicondioxide layers with lattice constants 125 and ...
Maryam Heidary Orojloo   +3 more
doaj   +1 more source

A Three-Dimensional Dual-Band Terahertz Perfect Absorber as a Highly Sensitive Sensor

open access: yesFrontiers in Physics, 2021
Terahertz (THz) absorbers are highly desirable in sensing and detection devices. Herein, we have proposed a 3D dual-band near-perfect absorber that works in the THz regime for sensing applications.
Wei Yin   +6 more
doaj   +1 more source

To the issue of optimizing the application of the sealing equipment in the injection well at the long-term pulsed water injection into it

open access: yesИзвестия высших учебных заведений: Нефть и газ, 2019
When determining the operability of the sealing elements, it is necessary to take into account the overall movement of the packer during operation, which it passes before the damage of the sealing elements when fixing the leakage failure in the annulus ...
Marat Ya. Khabibullin
doaj   +1 more source

Near-Infrared Rewritable, Non-Volatile Subwavelength Absorber Based on Chalcogenide Phase Change Materials

open access: yesNanomaterials, 2020
Chalcogenide phase change materials enable the realization of novel, non-volatile, switchable electronic and photonic devices. In this paper, we propose a type of rewritable, non-volatile near infrared subwavelength absorber based on chalcogenide phase ...
Jianfa Zhang   +5 more
doaj   +1 more source

PEROVSKITES AND OTHER FRAMEWORK STRUCTURE CRYSTALLINE MATERIALS (BOOK' FIRST PAGES AND PREFACE)

open access: yesMaterials and Devices, 2021
Perovskites are among the most famous materials due to their exceptional properties: they present nearly all existing types of interesting properties, in particular as ferroics or multiferroics, they may be insulators, (super)conductors, or ...
Saint-Grégoire P., Smirnov M.
doaj   +1 more source

Extreme Warm Absorber variability in the Seyfert Galaxy Mrk 704 [PDF]

open access: yes, 2011
In about half of Seyfert galaxies, the X-ray emission is absorbed by an optically thin, ionized medium, the so-called "Warm Absorber", whose origin and location is still a matter of debate.
A. L. Longinotti   +29 more
core   +2 more sources

Thermo-Hydraulic Performance of Solar Air Collectors with Artificially Roughened Absorbers: A Comparative Review of Semi-Empirical Models

open access: yesEnergies, 2020
Due to the poor thermal characteristics of the air, the absorber roughness of solar air collectors is commonly artificially increased in order to enhance the heat transfer to the air stream. However, this is also accompanied by an undesirable increase in
António Araújo
doaj   +1 more source

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