Soliton-Dragging Logic Gate with an Erbium-Doped Fiber Amplifier, (9999)
Islam, M. N., Soccolich, C. E., Hong, B. J., Chen, C. J., Simpson, J. R.
We place an erbium-doped fiber amplifier (EDFA) in th interaction region between orthogonally polarized control and signal pulses to widen the timing window for a soliton-dragging logic gate (SDLG)....
Simpson, J. R., Fagan, J. A., Becker, M. L., Hobbie, E. K., Walker, A. R. Hight
We compare Raman spectra from aqueous suspensions of length-separated single-walled carbon nanotubes (SWCNTs) dispersed using either polymer adsorption of single-stranded DNA or miscelle...
LOW-FREQUENCY RAMAN SPECTROSCOPY OF CARBON NANOTUBES (2008)
Walker, A. R. Hight, Simpson, J. R., Fagan, J. A., Yildirim, Taner
Author Institution: National Institute of Standards and Technology, Gaithersburg, MD 20899; and Towson University, Baltimore, MD 21252
Temperature dependent optical studies of Ti$_{1-x}$Co$_x$O$_2$ (2003)
Guha, S., Ghosh, K., Keeth, J. G., Ogale, S. B., Shinde, S. R., Simpson, J. R., ...
We present the results of Raman and photoluminescence (PL) studies on epitaxial anatase phase Ti$_{1-x}$Co$_x$O$_2$ films for $x$ = 0-0.07, grown by pulsed laser deposition. The low doped system...
High Temperature Ferromagnetism with Giant Magnetic Moment in Transparent Co-doped SnO2-d (2003)
Ogale, S. B., Choudhary, R. J., Buban, J. P., Lofland, S. E., Shinde, S. R., Kale, S. N., ...
Occurrence of room temperature ferromagnetism is demonstrated in pulsed laser deposited thin films of Sn1-xCoxO2-d (x
Exchange interaction effects on the optical properties of LuMnO3 (2002)
Souchkov, A. B., Simpson, J. R., Drew, H. D., Quijada, M., Ishibashi, H., Hur, N., ...
We have measured the optical conductivity of single crystal LuMnO3 from 10 to 45000 cm-1 at temperatures between 4 and 300 K. A symmetry allowed on-site Mn $d$-$d$ transition near 1.7 eV is observed...
Optical band edge shift of anatase cobalt-doped titanium dioxide (2002)
Simpson, J. R., Drew, H. D., Shinde, S. R., Choudhary, R. J., Ogale, S. B., Venkatesan, T.
We report on the optical properties of magnetic cobalt-doped anatase phase titanium dioxide Ti_{1-x}Co_{x}O_{2-d} films for low doping concentrations, 0
Ferromagnetism in laser deposited anatase Ti$_{1-x}$Co$_{x}$O$_{2-$\delta$}$ films (2002)
Shinde, S. R., Ogale, S. B., Sarma, S. Das, Simpson, J. R., Drew, H. D., Lofland, S. E., ...
Pulsed laser deposited films of Co doped anatase TiO2 are examined for Co substitutionality, ferromagnetism, transport, magnetotransport and optical properties. Our results show limited solubility...
Temperature Dependence of Low-Lying Electronic Excitations of LaMnO_3 (2001)
Quijada, M. A., Simpson, J. R., Drew, H. D., Lynn, J. W., Vasiliu-Doloc, L., Mukovskii, Y. M., ...
We report on the optical properties of undoped single crystal LaMnO_3, the parent compound of the colossal magneto-resistive manganites. Near-Normal incidence reflectance measurements are reported in...
Temperature dependent scattering rate and optical mass of ferromagnetic metallic manganites (1999)
Simpson, J. R., Drew, H. D., Smolyaninova, V. N., Greene, R. L., Robson, M. C., Biswas, Amlan, ...
We report on the optical properties of the hole-doped manganites La_0.7Ca_0.3MnO_3 and La_0.7Ca_0.3MnO_3. Transmission and reflection of thin films are measured in the infrared at temperatures from...
Cerne, J., Schmadel, D. C., Grayson, M., Jenkins, G. S., Simpson, J. R., Drew, H. D.
A sensitive mid-infrared (MIR, 900-1100 cm-1, 112-136 meV) photo-elastic polarization modulation technique is used to measure simultaneously Faraday rotation and circular dichroism in thin metal...
Quijada, M., Cerne, J., Simpson, J. R., Drew, H. D., Ahn, K. H., Millis, A. J., ...
We report on the optical properties of the hole-doped manganites Nd_{0.7}Sr _{0.3}MnO_{3}, La_{0.7}Ca_{0.3}MnO_{3}, and La_{0.7}Sr_{0.3}MnO_{3}. The low-energy optical conductivity in the...
Soliton dragging in discrete and distributed amplifiers (1993)
Islam, M N, Mihailidi, M, Soccolich, C E, DeSouza, E A, Pleibel, W, Stolen, R H, ...
The authors introduce erbium-doped fibre amplifiers (EDFA) into soliton-dragging logic gates (SDLG) to improve their performance in terms of switching energy, fan-out and tolerance to timing jitter....
Progress in Erbium Doped Fiber Amplifiers, (1992)
Simpson, J. R., DiGiovanni, D. J.
Erbium fiber amplifiers are entering a fourth year of development with six commercial offerings now available, the result of rapid improvements in pump lasers, wavelength division multiplexers,...
Effects of organic matter on virus transport in unsaturated flow.
Powelson, D K, Simpson, J R, Gerba, C P
The effects of natural humic material and sewage sludge organic matter (SSOM) derived from primary treated sewage sludge on virus transport by unsaturated flow through soil columns were evaluated....
McCarthy, N C, Simpson, J R, Coghill, G, Kerr, M A
The distribution in paraffin fixed human tissues of a carbohydrate antigen defined by two monoclonal antibodies raised against human granulocytes has been studied by means of an immunoperoxidase...
Adkins, G. E., Beasley, P., Jones, G. Blundell, Bradbeer, T. L., Brimblecombe, F. S. W., Cantrell, G. L., ...
Effects of organic matter on virus transport in unsaturated flow.
Powelson, D K, Simpson, J R, Gerba, C P
The effects of natural humic material and sewage sludge organic matter (SSOM) derived from primary treated sewage sludge on virus transport by unsaturated flow through soil columns were evaluated....
McCarthy, N C, Simpson, J R, Coghill, G, Kerr, M A
The distribution in paraffin fixed human tissues of a carbohydrate antigen defined by two monoclonal antibodies raised against human granulocytes has been studied by means of an immunoperoxidase...