Materials Literature
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Hard x-ray research taking advantage of both the coherence and timing properties of next generation low-emittance storage rings will thrive in exploring the spatial and temporal correlations at the nanometer and nanosecond scales. Current gating technology with fast detectors and mechanical choppers will not be able t…
Miniaturized optical systems show often unconventional responses compare to larger systems of the same design. We investigate such new phenomena using microlenses, and demonstrate characteristics beyond the refraction limit of the micro-optical systems.
Recent development of hierarchical fabrication techniques for three-dimensional metamaterial and plasmonic structures based on ultra-accurate and ultra-precise electron-beam lithography overlay will be discussed in this article.
Emerging two-dimensional materials exhibit interesting optical properties. Here, we will summarize some of our recent work on the integration of 2D materials such as graphene and MoS2with an electromechanical platform for achieving novel optical functionality for hybrid devices and sensors.
Transformation optics provide a novel method of controlling the propagation of light. By applying it to a resonant optical cavity, whispering gallery modes can be restored in an optical cavity of deformed boundary.
Metasurfaces have drawn much attention in optics and nanophotonics due to the powerful capability of full control of light. We introduce nanosieve based metasurfaces for realizing optical holograpy and multiple-dimensional information encryption.
This work presents the polarization control of interchangeable multispectral absorption based on the dual-band metamaterial absorber in split mode. Large modulation depth of absorption is obtained during multi-band transition through polarization control.
The effect of process parameters on the propane conversion and the composition of oxidation products, particularly the methanol to carbon monoxide ratio, has been studied. A numerical study of the laws governing the partial oxidation of propane has been conducted in terms of a model that approximately describes the ma…
A novel scheme of dispersion-free metamaterial is proposed to control the polarization states of terahertz waves in a broadband regime. The artificially engineered phase delay is tunable with the space-variant P-B phase.
Fructose-6-phosphate aldolase cleavages fructose-6-phophate to glyceraldehyde-3-phosphate and dihydroxyacetone. To produce glycerin from dihydroxyacetone, glycerol dehydrogenase was used. The synthesis of glycerin was started from the very beginning with cell transformation, through heat shock, of Escherichia coli str…
info:eu-repo/semantics/nonPublished
Lors de l’exploitation d’un réacteur nucléaire, les doses externes individuelles reçues par le personnel sont mesurées, enregistrées conformément aux réglementations en vigueur. Leur somme permet d’évaluer une dosimétrie collective annuelle exprimée en H.Sv/an. Cette information est un outil intéressant pour comparer…
Abstract The versatility of gallium and its compounds is enormous. Apart from its industrial applications due to its cost effectiveness, the diversity of the uses can be seen in biological research. The non toxic nature of gallium is an added advantage to its biological applications. The inorganic compounds are useful…
We present a new kind of electro-mechanical optical grating with highly tunable diffraction efficiency. An efficient overlapping effect allows us to use an integrated direct piezo actuation. We demonstrate the principle with a simulation and a prototype with which we achieve tuning capabilities of 97% in the 1stdiffra…
Amphiphilic gold nanoparticles have been synthesized and employed for improving the performance of polymer optoelectronics devices. Such nanocomposites could be readily incoporated into the buffer and/or photoactive layers, resulting in obvious enhancements in device efficiencies.
The First Task of PHPR is a 100 year task that must be fully implemented when ITER [International Thermonuclear Experimental Reactor] goes online. Which then gives us a 40 year window of opportunity to complete 60 percent of the First Task of PHPR and 60 years to complete. The First Tasks confronts the question of how…
The poster presents a parallel matrix inversion algorithm that has been implemented to be part of a matrix inverse library used by the SMEAGOL ab initio electronic code. The SMEAGOL package uses a combination of Density Function Theory (DFT) and Non-Equilibrium Green's Functions (NEGF) to study nanoscale electronic tr…
Gypsum has been used as building material over a very long period of time. The production of gypsum plaster in Iraq confined on three types; plaster of Paris, ordinary gypsum and mechanical gypsum. The purpose of this study is to present a proposal to produce another type of gypsum plaster called Keene's cement, it ha…
We analyze the electromagnetic wave coupling mechanism of MEMS reconfigurable metamaterial towards the design for narrow band filter performance in terahertz frequency. A comparison between two metamaterial structures is presented for the study.
The optical properties of two-component films composed of mesotetraphenylporphyrin (TPP) and erbium-doped yttrium vanadate Yt0.95Er0.05VO4 prepared by spincoating have been studied for the first time. A decrease in the TPP content in the films leads to a hypsochromic shift of the Soret band peak by 1–9 nm; this findin…