Materials Literature
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Ce3+ doped garnet phosphors are used for white-LED because Ce3+ in a garnet structure A3B2C3O12 has blue absorption and efficient visible luminescence due to the 4f-5d allowed transition. The 5d energy level of Ce3+ is shifted by crystal field splitting and nephelauxetic effect. In garnet hosts, it is known that the d…
International audience
Recently, perfect electromagnetic metamaterial absorbers utilizing single-turn metallic helix architecture have been proposed and realized in practice[1]. However, up till now these structures had large unit cell size (on the order of centimeters) and consequently, their absorption resonances were found at radio frequ…
Poster E1012b presentado en el 27th International Meeting on Organic Geochemistry September 13–18, 2015, Prague, Czech Republic
The core of an advanced gas-cooled reactor (AGR) consists of a large assembly of graphite bricks that are inter-connected through a keying system. The keying system requires that the geometry of the fuel bricks contains keyways with 90o corners. Therefore, if the fuel brick is stressed, the presence of sharp corners l…
International audience
The terahertz (THz) band of electromagnetic (EM) waves is under high interest during last decades since considerable number of new phenomena in EM wave - matter interaction in this range has been found [1]. There exist different ways of exciting THz waves [1,2]. Our analysis considers THz wave emission technique using…
Carbon nanotubes (CNTs) have been of interest to researchers because of their superior electrical, thermal and photonic properties. Applications of the energy saving devices and optical devices are expected. In the field of optical device applications, for example CNT has the applicability to an photonic metamatateria…
Surface-enhanced Raman scattering (SERS) is a powerful analytical tool for sensitive and selective detection of chemical and biological molecules adsorbed on metallic nano-surface. We reported that the metallic nano-surface was prepared by self-assembling method of silver nano-particles with oil-in-water (O/W) emulsio…
Plasmonic-based device offers novel range of applications in optoelectronics. It allows strong coupling between light and surface plasmon polaritons (SPPs) meanwhile different methods to improve light-matter interaction have been recently the focus of many studies. In present study, we fabricated large area, 10 × 10 m…
Transition metal dichalcogenides (TMDC, Fig.1) have attracted a great deal of attention because of their unique properties such as spin-valley-coupled electronic structure, valley pseudospin degree of freedom, intense photoluminescence and FET operation. The family of TMDCachi atomic layers provides a brand new and wi…
Raman scattering spectroscopy has been widely used to analyze molecular structures of materials. Surface enhanced Raman scattering (SERS) is a surface-sensitive technique that enhances Raman scattering by molecules adsorbed on rough or nanostructured metal surfaces [1]. Nanoparticles have surface plasmon resonance (SP…
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Raman scattering is an optical technique that measures intrinsic properties of the molecules. Hyper-Raman scattering (HRS) is another kind of non-linear Raman scattering technique, where incident photons and scattered photons are separated by almost half of the wavelength. As scattering mechanism for RS and HRS are di…
High resolution coherent nonlinear optical spectroscopy of an ensemble of red-emitting InGaN quantum dots in GaN nanowires is reported. The data show a pronounced atom-like interaction between resonant laser fields and quantum dot excitons at low temperature that is difficult to observe in the linear absorption spectr…
International audience
International audience
Reference alloy waste forms (RAW) underwent hybrid corrosion/immersion testing to parameterize the ANL analytical oxidative-dissolution model to enable the calculation of fractional release rates. The waste forms tested at SRNL were variations of the RAW-3 formulation that uses HT9 as the main alloy component, and are…
We present some promising ideas to treat the problem of making completely rigorous the development of our expression for $λ_d(p)$ of the monomer-dimer problem on a $d$-dimensional hypercubic lattice \begin{equation}\label{abstract1} λ_d(p)=\frac{1}{2}\Big(p\ln(2d)-p\ln(p)-2(1-p)\ln(1-p)-p\Big) +\sum_{k=2}a_k(d)p^k \en…
The study of the effectiveness of the dust devices helicopter gas turbine engines. Based on the numerical simulation of two-component flow assessed the effectiveness of various design options.