UScholar Works
 
Filters: Date: "2003" Department: "Physics" Collection: "ir_uspace"
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CreatorTitleDescriptionSubjectDate
1 Kieda, David B.Antarctic impulsive transient antenna (ANITA) instrumentationWe will report on the details of the ANITA instrument. This instrument is fundamentally a broadband antenna, which is arrayed and constructed in such a way as to be optimized for the detection and characterization of high-energy neutrino cascades [1]. The requirement to maximize the detector view of...ANITA; Antarctic Impulsive Transient Antenna; Neutrino; Balloon; Antarctica2003
2 Vardeny, Zeev ValentineExcitons, polarons, and laser action in poly(p-phenylene vinylene) filmsWe have used a multitude of linear and nonlinear cw optical spectroscopies to study the optical properties of water precursor poly(p-phenylene vinylene) (PPV) thin films. These spectroscopies include absorption, photoluminescence, photoinduced absorption and their respective optically detected magne...PPV films; Excitons; Laser action; Poly(p-phenylene vinylene)2003
3 Kieda, David B.High resolution charge measurements of UH cosmic ray nuclei using a direct imaging Cherenkov ground-based observatoryThe accurate determination of the elemental composition of cosmic rays at high energies is expected to provide crucial clues on the origin of these particles. Here we discuss a technique that has become possible through the use of modern ground-based Cherenkov imaging detectors. We combine a measure...Cherenkov light; Quark star; UH nuclei; Magnetic monopole2003
4 Lupton, John MarkOne and two-photon photocurrents from tunable organic microcavity photodiodesWe have constructed multilayer thin-film organic microcavity photodiodes with the photoactive layer comprised of a spin-coated conjugated polymer and an evaporated C60 layer. The electrodes are designed as semitransparent mirrors which form a resonant cavity structure. The photocurrent spectra show ...Photocurrents; Microcavity photodiodes; Tunable photodiodes2003
5 Kieda, David B.Overview of the ANITA projectThe ANITA project is designed to investigate ultra-high energy (>1017 eV) cosmic ray interactions throughout the universe by detecting the neutrinos created in those interactions. These high energy neutrinos are detectable through their interactions within the Antarctic ice sheet, which ANITA will u...ANITA; Antarctic Impulsive Transient Antenna; High energy neutrinos; Antarctica; Balloon2003
6 Wu, Yong-ShiQuantum phase transition and engineering in two-component BEC in optical latticesIn this paper we review recent progress in studying quantum phase transitions in one- and two-component Bose-Einstein condensates (BEC) in optical lattices. These phase transitions involve the emergence and disappearance of quantum coherence over whole optical lattice and of linear superposition of...2003
7 Lupton, John MarkRecombination kinetics in wide gap electroluminescent conjugated polymers with on-chain emissive defectsWe analyze the experimental dependence of temporally and spectrally resolved electroluminescence (EL) from polyfluorene-based light-emitting diodes on electric field and temperature. The blue band in the EL spectrum is caused by emission from the polymer backbone, while the low-energy green emission...Recombination kinetics; On-chain emissive defects; Wide gap; Blue-emitting; Green-emitting; Excitons2003
8 Kieda, David B.Science capabilities of the VERITAS array of 10m imaging atmospheric Cherenkov gamma-ray detectorsThe Very Energetic Radiation Imaging Telescope Array System (VERITAS) is an array of seven 10m aperture telescopes used for gamma-ray astronomy in the 50 GeV to 50 TeV (1 TeV= 101 2 electron Volt) energy range. The gamma rays are detected by measuring the optical Cherenkov light emitted by the casc...VERITAS2003
9 Rogachev, AndreySuperconducting properties of polycrystalline Nb nanowires templated by carbon nanotubesContinuous Nb wires, 7-15 nm in diameter, have been fabricated by sputter-coating single fluorinated carbon nanotubes. Transmission electron microscopy revealed that the wires are polycrystalline, having grain sizes of about 5 nm. The critical current of wires thicker than ~12 nm is very high (107 A...Polycrystalline Nb; Carbon nanotubes; Langer-Ambegaokar-McCumber-Halperin; Phase slips2003
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