Materials Literature
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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…
We present a mechano-optical nano-antenna capable of nanometer spatial resolution and stability over a broad temperature range. We theoretically demonstrate a matching condition for mechanical properties that is essential for maximizing thermal expansion differences across a broad temperature range. Mechano-optical na…
Pour maîtriser les phases de conception et de construction de ses nouveaux réacteurs, les filières nucléaires du monde entier font évoluer leurs méthodes de travail et leurs organisations. En France aussi, la culture du secteur change pour aller vers un assouplissement des relations contractuelles et une plus grande i…
Intervertebral disc cell apoptosis has been reported as the major factor responsible in promoting disc degeneration. In this study we hypothesize that collagen fibres with manganese dioxide (MnO2) nanoparticles (NPs) can increase oxygen levels by scavenging ROS species and converting it into byproducts. The specific o…
The integration of a varifocal mirror with a scanner using wafer bonding technology is presented. The wafer bonding technology enables us to enlarge the design possibility. A 2 mm diameter varifocal mirror is bonded on the scanner. The optical scanning angle is 7° at 3.59 kHz. The focal length changes from infinity to…
The integral emissivity of oxide materials at high temperatures are evaluated by means of the band model; its behavior is explained. A simplified model of the band structure at high temperatures is proposed, and the expression for the calculation of the relative population of the states under thermodynamic equilibrium…
In this work, we present a multiband flexible metamaterial with one of the resonance acting as a strain sensor, while the other resonances remain unchanged with bending strain, that might occur due to wrapping around irregular curved surface. And the first resonance frequency 0.51THz of the horizontal dipole blue shif…
Titanium-tungsten (TiW) barrier layers were treated with process chemicals like palladium sulfate (PdSO4), diluted hydrofluoric acid (DHF), O2plasma etc and the metal oxides change post treatments were investigated. The changes of metal oxides on surface and inside the TiW layer were characterized with Auger surface s…
Mineral filler is used for resin compounds, because it increases the stiffness and thermal stability of a resin compound, and it also cuts down the cost. Calcium carbonate, silica, magnesium oxide, and others are used as filler materials in general, and the type of filler material, the size, and content can affect the…
Phosphorus is typically a common dopant used in wafer manufacturing. Measuring of phosphorous in Si-wafer is always demanding and matrix interferences is always a problem in VPD ICPMS. It is reported here the measuring of phosphorus in VPD matrix using ICPMS.
Out-of-plane reconfigurable microcantilevers integrated into metamaterial unit cells is explored as a technological platform for the realization of advanced polarization control of THz waves. By varying the positioning of the microcantilever structures and isolating the control signals to these cantilevers, various de…
Atomically-thin materials such as single-walled carbon nanotubes and graphene are prone to chemical attack because all of the constituent atoms are exposed. Here we describe progress from our lab in the synthetic creation of a tube-in-a-tube (Tube^2) semiconductor and their first applications in the electrical detecti…
With the constant drive for higher performance and new functionality in modern electrical and optical devices, the need for growth and characterization in a practical, economical and controlled manner has become increasingly important. The intent of my proposed research is to help provide a vertically-integrated basis…
We demonstrated a blue phosphorescent organic light-emitting diode with the maximum current efficiency and power efficiency of 57.4 cd/A and 51.6 lm/W, respectively, based on trizaole derivatives as the host of the emitting layer.
This paper presents the designs of the monolithic square ring resonators based on the composite right/left-handed (CRLH) transmission line (TL) operated in left-handed slow-wave region. The proposed resonator is fully realized by only using CRLH cells, and its design equation is derived based on the left-handed guidin…
In this study, we investigated the stable and efficient quantum-dot light emitting diodes (QLEDs) under high driving current by using composition-gradient thick-shell CdSe@ZnS/ZnS QDs. Thick-shell QDs with low defective structure can effectively avoid the electron-hole pairs from nonradiative Auger recombination and p…
Reducing the size of device components, e.g. waveguides and resonant cavities, beyond the diffraction limit is a means to an end. Here we demonstrate the condition required to have air cavities within a uniaxial metamaterial clad waveguide. Our work reveals that air cavity sizes much smaller than the operating wavelen…
Oxyfluoride glasses, and more recently, glass ceramics, doped with trivalent rare earth ions (RE) have attracted much attention for near-infrared laser applications with the promise to combine the merits of fluorides (low phonon energy, moderate refractive indexes, extensive IR window) and oxides (high chemical and me…
Amorphous indium-gallium-zinc-oxide thin film transistor (a-IGZO TFT) with offset structure is fabricated for active-driving of ZnO nanowire field emitters. ZnO nanowire field emitters grown by thermal oxidation method is integrated with the a-IGZO TFT. The results proved that the growth process of ZnO nanowires is co…