Materials Literature
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Single-wall carbon nanotubes (SWNTs) are a new type of nanomaterial with strong optical absorption. SWNTs also have intense Raman signals that facilitate convenient monitoring of their location within tissue thereby enabling noninvasive pharmacokinetic study. We hypothesize that SWNTs can absorb 785-nm laser light and…
A semiconductor quantum dot (QD) containing a single Mn atom is a promising system from the point of view of future information processing and storage devices. An efficient optical read-out of the single Mn spin state in a CdTe/ZnTe quantum dot, as well as studies of dynamics of this state, were recently reported by L…
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We create large gold domains (up to 15 nm) exclusively on one side of CdS or CdSe/CdS quantum rods by photoreduction of gold ions under anaerobic conditions. Electrons generated in the semiconductor by UV stimulation migrate to one tip where they reduce gold ions. Large gold domains eventually form; these support effi…
We performed extensive spectroscopy of tellurite glasses doped with high concentration of Tm ions for laser emission at around 2 micron wavelength. The aim of the work is to develop a glass suitable for single-frequency fiber laser. In fact such a kind of laser require the use of short cavity length and therefore high…
We describe wide temperature range bimesogenic chiral nematic liquid crystals with high flexoelectro-optic coefficients (e/K),of the order of 2.0 CN-1 m-1, high switching angles, > 160° and 50-100μs response times, which may be used to give gray scale devices in both the ULH texture, with an optimum optical in plane s…
Mode characteristics for midinfrared microsquare resonators with sloped sidewalls and confined metal layers are investigated by finite-difference time-domain (FDTD) techniques. For a microsquare with a side length of 10 ¿m, the mode quality (Q) -factors of 8329, 4772, and 2053 are obtained for TM5,7mode at wavelength…
Two different template structures of dot air-bridges and nanorods were used for 300 µm GaN growth by hydride vapor phase epitaxy (HVPE). The selective growth of arrays of dot air-bridges and nanorods whose sidewalls coated with SiO2 are identified and exploited to form a compliant layer to decouple the impact due to t…
Gold nanoparticles have received much attention due to their potential diagnostic and therapeutic applications. Gold nanoparticles are attractive in many biomedical applications because of their biocompatibility, easily modifiable surfaces for targeting, lack of heavy metal toxicity, wide range of sizes (35-100 nm), t…
We report results of ab initio calculations on (GaN)n nanoclusters with n = 12, 16, 22, and 24 using generalized gradient approximation (GGA) for the exchange-correlation energy. We find cage structures of GaN clusters to be lower in energy as compared to bulk fragments which have been fully optimized. Selected cages…
Herein we present our results from the picosecond and nanosecond nonlinear optical studies of two novel phthalocyanines {[(SO3Na)4CuPc] and [(SO3Na)4NiPc]} using the Z-scan technique. Open aperture Z-scan data revealed that the picosecond nonlinear absorption was dominated by three-photon absorption while in the nanos…
Semiconductor quantum dots (QDs) are widely used in different fields of bioscience and biotechnology due to their unique optical properties. QDs can be used as fluorescent markers for optical detection and monitoring of deeply located tumors in vivo after specific labeling achieved by conjugating of QDs with targeting…
A one-dimensional periodic sub-wavelength structure (SWS) was fabricated on a glass plate by a glass-imprinting method. Thermal and optical properties of lithium bismuth gallium borate glasses were investigated for the development of glass suitable for the glass-imprinting method. It was found that refractive index an…
Abstract New ternary rare earth metal boride carbides with compositions close to RE10B9C10 (RE = Gd, Tb) were prepared from the elements by melting around 1800 K followed by annealing in silica tubes at 1270 K for one month. The crystal structure of the terbium compound was solved by single‐crystal X‐ray diffraction.…
ALD is currently one of the most rapidly developing fields of thin film technology. Presentation gives an overview of ALD technology for optical film deposition, highlighting benefits, drawbacks and peculiarities of the ALD, especially compared to PVD. Viewpoint is practical, based on experience gained from tens of di…
We investigate the functioning of an innovative monolithically integrated surface plasmon resonance (SPR) device comprising a metal coated SiO2 layer deposited atop a photoluminescence emitting quantum well (QW) wafer. The device takes advantage of the uncollimated and incoherent emission of QW microstructure. This pr…
In this work we use the multi-scale software tool TiberCAD to study the transport and optical properties of InGaN quantum disk (QD) - based GaN nanocolumn p-i-n diode structures. IV characteristics have been calculated for several values of In concentration in the QD and of nanocolumn width. Strain maps show a clear r…
LCOS for phase-only holography is ideally made to better optical tolerance than that for conventional amplitude modulating applications. Die-level assembly is suited to custom devices and pre-production prototypes because of its flexibility and efficiency in conserving the silicon backplane. Combined with automated as…
We report on the molecular beam epitaxial growth, fabrication, and characterization of InN/Si nanowire heterojunction solar cells. Vertically aligned p-doped-intrinsic-n-doped (p-i-n) InN nanowires spontaneously formed on n-type Si(111) substrates as well as n-i InN nanowires spontaneously formed on p-Si(111) were dem…
Hyperthermia in combination with chemotherapy has been widely used in cancer treatment. Our previous study has shown that rapid rate hyperthermia in combination with chemotherapy can synergistically kill cancer cells whereas a sub-additive effect was found when a slow rate hyperthermia was applied. In this study, we e…