Index Catalog // ScholarsArchive@OSU

Creator:: Xu, Xiaobin, Hasan, Dihan, Wang, Lei, Chakravarty, Swapnajit, Chen, Ray T., Fan, D. L., and Wang, Alan X.
Abstract:: We demonstrate a surface enhanced Raman scattering (SERS) substrate by integrating plasmonic-active SiO₂ nanotubes into Si₃N₄ gratings. First, the dielectric grating that is working under guided mode resonance (GMR) provides enhanced electric field for localized surface plasmon polaritons on the surface of metallic nanoparticles. Second, we use SiO₂ nanotubes with...
Resource Type:: Article

Creator:: Brown, Morgan A., Crosser, Michael S., Leyden, Matthew R., Qi, Yabing, and Minot, Ethan D.
Abstract:: Graphene is a promising material for applications in aqueous electrolyte environments. To explore the impact of such environments on graphene's electrical properties, we performed Hall bar measurements on electrolyte-gated graphene. Assuming a Drude model, we find that the room temperature carrier mobility in water-gated, SiO₂-supported graphene reaches 7000 cm²/Vs, comparable to...
Resource Type:: Preprint and Article

Creator:: Lee, Byounghwak, Mousavian, Ali, Paul, Michael J., Thompson, Zachary J., Stickel, Andrew D., McCuen, Dalton R., Jang, Eui Yun, Kim, Yong Hyup, Kyoung, Jisoo, Kim, Dai-Sik, and Lee, Yun-Shik
Abstract:: We demonstrate that unidirectionally aligned, free-standing multi-walled carbon nanotubes (CNTs) exhibit highly anisotropic linear and nonlinear terahertz (THz) responses. For the polarization parallel to the CNT axis, strong THz pulses induce nonlinear absorption in the quasi-one-dimensional conducting media, while no nonlinear effect is observed in the perpendicular polarization configuration. Time-resolved...
Resource Type:: Article

Creator:: Chong, Xinyuan, Li, Erwen, Squire, Kenneth, and Wang, Alan X.
Abstract:: We report an ultra-compact, cost-effective on-chip near-infrared spectroscopy system for CO₂ sensing using narrow-band optical filter array based on plasmonic gratings with a waveguide layer. By varying the periodicity of the gratings, the transmission spectra of the filters can be continuously tuned to cover the 2.0 μm sensing window with high...
Resource Type:: Article

Creator:: Li, T. T., Aji, L. B. Bayu, Heo, T. W., Santala, M. K., Kucheyev, S. O., and Campbell, G. H.
Abstract:: Sputter deposited amorphous Ge thin films had their nanostructure altered by irradiation with high-energy Ar⁺ ions. The change in the structure resulted in a reduction in medium range order (MRO) characterized using fluctuation electron microscopy. The pulsed laser crystallization kinetics of the as-deposited versus irradiated materials were investigated using the...
Resource Type:: Article

Creator:: Santala, M. K., Raoux, S., and Campbell, G. H.
Abstract:: The kinetics of laser-induced, liquid-mediated crystallization of amorphousGe thin films were studied using multi-frame dynamic transmission electron microscopy (DTEM), a nanosecond-scale photo-emission transmission electron microscopy technique. In these experiments, high temperature gradients are established in thin amorphousGe films with a 12-ns laser pulse with a Gaussian spatial profile. The hottest...
Resource Type:: Article

Creator:: Kumar, Nitish, Ionin, Aleksey, Ansell, Troy, Kwon, Seongtae, Hackenberger, Wesley, and Cann, David
Abstract:: The need for miniaturization without compromising cost and performance continues to motivate research in advanced capacitor devices. In this report, multilayer ceramic capacitors based on relaxor BaTiO₃-Bi(Zn₁/₂Ti₁/₂)O₃ (BT-BZT) were fabricated and characterized. In bulk ceramic embodiments, BT-BZT has been shown to exhibit relative permittivities greater than 1000, high resistivities (ρ > 1...
Resource Type:: Article

Creator:: Wei, Shuai, Stolpe, Moritz, Gross, Oliver, Evenson, Zach, Gallino, Isabella, Hembree, William, Bednarcik, Jozef, Kruzic, Jamie J., and Busch, Ralf
Abstract:: Using in-situ synchrotron X-ray scattering, we show that the structural evolution of various bulk metallic glass-forming liquids can be quantitatively connected to their viscosity behavior in the supercooled liquid near T[subscript g]. The structural signature of fragility is identified as the temperature dependence of local dilatation on distinct key atomic...
Resource Type:: Article

Creator:: Paul, Michael J., Lee, Byounghwak, Wardini, Jenna L., Thompson, Zachary J., Stickel, Andrew D., Mousavian, Ali, Choi, Hyunyong, Minot, Ethan D., and Lee, Yun-Shik
Abstract:: We show that the transmission of a terahertz (THz) pulse through single-layer graphene is strongly nonlinear. As the peak electric field of the THz pulse exceeds 50 kV/cm, the graphene becomes increasingly transparent to the THz radiation. When field strength reaches 800 kV/cm, the increased transparency corresponds to a two-fold...
Resource Type:: Article

Creator:: Alimardani, Nasir and Conley, John F., Jr.
Abstract:: Metal-insulator-insulator-metal tunnel diodes with dissimilar work function electrodes and nanolaminate Al₂O₃-Ta₂O₅ bilayer tunnel barriers deposited by atomic layer deposition are investigated. This combination of high and low electron affinity insulators, each with different dominant conduction mechanisms (tunneling and Frenkel-Poole emission), results in improved low voltage asymmetry and non-linearity of current...
Resource Type:: Article

ScholarsArchive@OSU