Materials Literature
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Using a solid-phase method, single-phase solid solutions of La1–x Nd x InO3 (x = 0.007, 0.02, 0.05), LaIn0.99Cr0.01O3, and La0.95Nd0.05In0.995Cr0.005O3 have been obtained and their excitation and photoluminescence (PL) spectra have been studied at room temperature. It is found that the intensity of excitation and PL b…
Metamaterial absorbers (MAs) are one of the important applications of metamaterials, which are artificially constructed plasmonic nanostructures usually based on metal-insulation-metal (MIM), and possess exotic electromagnetic properties that cannon be realized by nature materials [1]. Due to the advantages of perfect…
In this experimental work, PbS/ZnS/ZnO nanocomposite was synthesized via a simple co-precipitation method. The effect of Zn2+/Pb2+ mole ratio was investigated on the product size and morphology. The products were characterized via scanning electron microscopy to obtain product size and morphology. The optical properti…
It is our great pleasure to invite you to attend the International Microwave Workshop Series on Advanced Materials and Processes for RF and THz Applications (IEEE IMWS-AMP 2016) Besides, we would like to take this opportunity to express our sincere appreciation to the leading scientists, session organizers and all con…
We describe a technique for realizing high-efficiency dielectric resonator antennas composed of intrinsic silicon in the terahertz range. These dielectric resonator antennas are deployed in both uniform and nonuniform array configurations, for the manipulation of terahertz radiation. The uniform array configuration is…
Shaping the flow of light based on abrupt phase discontinuities operation in high order modes is investigated. As a proof-of-concept, we design two types of super cells consisting of V-shaped antennas with phase shifts covering 2*2π and 3*2π. The simulations show that the linear gradient phased metasurfaces using the…
Graphene field-effect transistor (FET) has been successfully demonstrated for terahertz (THz) detection at room temperature. This graphene FET has a differential feeding structure and a high output impedance up to several thousand Ohms. These characteristics significantly challenge the antenna design, especially a hig…
Monolayer MoS2photodetectors are modeled and simulated by self-consistently solving diffusive transport equations in the presence of light illumination with the two-dimensional (2-D) Poisson equation. The simulated results indicate that very high photoresponsivity (PR) of ∼1000A/W observed in others' experiments is du…
Fano resonance (FR) is routinely observed in three dimensional(3D) symmetric metamaterials(MMs) consisting of elliptical nanoholes array (ENA) embedding through metal/dielectric/metal (MDM) multilayers. It is shown theoretically that a square periodic ENA perforating through MDM layers produces a FR response in the ne…
Özet : Doğal taşlar geçmişten günümüze kadar yapılarda yaygın kullanılan malzemelerden birisidir. Özellikle dış ortamlarda kullanılan taşlar önemli atmosferik etkilere maruz kalmakta ve bunun sonucunda deforme olabilmektedir. Bu atmosferik etkilerden birisi de donma-çözünmedir. Donma-çözünme özellikle gözenekli kayaçl…
We demonstrate various types of reconfigurable metamaterials utilizing π-conjugated polymer in terahertz (THz) and microwave frequency ranges. Linear actuators made from heavily doped polypyrrole film are utilized to change the relative lateral position of two THz metasurfaces with a control voltage, and accordion-sha…
In order to accurately predict the frequency selective surface (FSS) characteristics in wide band, an improved equivalent circuit model for slot FSS is proposed. Based on modal decomposition equivalent circuit method (MDECM), higher-order waveguide modes have been taken into account for approximating the FSS element a…
Metasurface, as a kind of metamaterials with only one or two layers of functional structures, has arouses a world-wide research enthusiasm during the past several years. Especially, recent studies on metasurfaces working in the terahertz regime has partly fullfilled the emergent lack for the terahertz devices, which i…
In this paper, an analytical solution shows that an ultrathin anisotropic ε-near-zero (AENZ) metamaterial (MM) layer backed by a metallic substrate can perfectly absorb an incident plane wave at a critical angle. The perfect absorption angle can be controlled by changing the loss of the AENZ MMs. An ultrathin microwav…
Magnetic surface polariton (MSP) is a surface electromagnetic mode which is the dual of surface plasmon polaritons and has some peculiar properties. In the present paper, based on this surface mode, we design a 2D Luneburg lens for the manipulation of magnetic surface polariton. MSP-based devices may be realized using…
New approaches to the analysis of small-angle X-ray scattering data from nanoscale systems based on the optimization and direct multiple shooting methods are presented. A program is developed, which bears on these new approaches and allows a user to model small-angle X-ray diffraction data, introduce collimation corre…
Extended Abstract It is of scientific and practical significance to study surface plasmon polariton (SPP) scattering-enhanced light emission which occurs in organic light emitting diodes. Energy transfer from nonradiative components in an organic layer to SPPs could be extracted as light through the SPP scattering at…
The dephosphorization (de-P) efficiency of SiMn alloy melt using CaO-CaF2 flux was measured at 1823 K under a strongly reducing atmosphere. De-P efficiency increased by increasing the CaO content up to CaO saturation point in the CaO-CaF2 flux at 1823 K, indicating that the phosphorus was removed from the SiMn melt by…
Concentration distributions of solid particles transported by pseudoplastic fluids in laminar regime were determined experimentally. Practically all the distributions show minimum concentration of solids near the centre of the pipe and higher toward the walls and even, for some conditions, the highest values near the…
Recently there have been many researches to develop new materials for active transparent electronic devices. Transparent p-n junction diodes for "invisible optoelectronic devices" have a wide range of applications such as smart window and organic lighting diodes. Although both of the n-type and p-type transparent cond…