Superlattice Magnetophonon Resonances in Strongly Coupled InAs/GaSb Superlattices (2007)
Deacon, R. S., Henriques, A. B., Nicholas, R. J., Shields, P. A.
We report an experimental study of miniband magnetoconduction in semiconducting InAs/GaSb superlattices. For samples with miniband widths below the longitudinal optical phonon energy we identify a...
Pulsed epitaxial lateral overgrowth of GaN by metalorganic vapour phase epitaxy (2007)
Liu, C., Shields, P. A., Denchitcharoen, S., Stepanov, S., Gott, A., Wang, W. N.
A mixed pulsed and normal GaN epitaxial lateral overgrowth (ELO-GaN) by epitaxy metalorganic vapour phase epitaxy (MOVPE) is reported in this study. Monitoring by using an in situ spectroscopic...
Improving led extraction efficiency through surface patterning - art. no. 666914 (2007)
Charlton, M. D. B., Lee, T., Zoorob, M. E., Shields, P. A., Wang, W. N.
We investigate improvement in performance attainable by etching Photonic. Crystals and Photonic Quasicrystals (PQC) into the top emitting surface of LEDs (PQC-LEDs). We describe the physical...
In situ monitoring of GaN epitaxial lateral overgrowth by spectroscopic reflectometry (2006)
Liu, C., Stepanov, S., Shields, P. A., Gott, A., Wang, W. N., Steimetz, E., ...
The application of spectroscopic reflectometry to the monitoring of epitaxial lateral overgrowth of GaN in low pressure metalorganic vapor phase epitaxy has been investigated. Real-time vertical and...
High temperature refractive indices of GaN (2006)
Liu, C., Stepanov, S., Gott, A., Shields, P. A., Zhirnov, E., Wang, W. N., ...
Undoped GaN (u-GaN) films were grown by low pressure metalorganic vapour phase epitaxy (LP-MOVPE) on sapphire substrates. In situ optical monitoring was applied to the growth process either using a...
In situ monitoring of GaN epitaxial lateral overgrowth by spectroscopic reflectometry (2006)
Liu, C., Stepanov, S., Shields, P. A., Gott, A., Wang, W. N., Steimetz, E., ...
Far-infrared modulated photoluminescence spectroscopy of InSb/GaSb quantum dot structures (2003)
Child, R. A., Nicholas, R. J., Mason, N. J., Shields, P. A., Wells, J-P. R., Bradley, I. V., ...
The first far-infrared modulated photoluminescence (FIRM-PL) measurements in InSb/GaSb quantum dots have been performed. Far-infrared absorption is found to both enhance and suppress the quantum dot...
Observation of magnetophotoluminescence from a GaN/AlxGa1-xN heterojunction (2002)
Shields, P A, Nicholas, R J, Takashina, K, Grandjean, N, Massies, J
Observation of magnetophotoluminescence from a GaN/AlxGa1-xN heterojunction (2002)
Shields, P A, Nicholas, R J, Takashina, K, Grandjean, N, Massies, J
Free carrier effects in gallium nitride epilayers: the valence band dispersion (2001)
Shields, P. A., Nicholas, R. J., Peeters, F. M., Beaumont, B., Gibart, P.
The dispersion of the A-valence-band in GaN has been deduced from the observation of high-index magneto-excitonic states in polarised interband magneto-reflectivity and is found to be strongly...
Shields, P. A., Nicholas, R. J., Grandjean, N., Massies, J.
A re-ordered valence band in GaN/AlGaN quantum wells with respect to GaN epilayers has been found as a result of the observation of an enhanced g-factor in magneto-luminescence spectra in fields up...
Modified membrane-filter procedure for concentration of enteroviruses from tap water.
Shields, P A, Berenfeld, S A, Farrah, S R
Enteroviruses added to 114 liters of dechlorinated tap water were recovered in a 16-ml sample by a two-stage concentration procedure in which different types of membrane filters were used in each...
Concentration of viruses in beef extract by flocculation with ammonium sulfate.
Bacteriophages and enteroviruses in water were adsorbed to positively charged filters (Virosorb 1MDS [AMF Cuno, Inc., Meriden, Conn.] or Seitz S [Republic Filters, Milldaler, Conn.]). Adsorbed...
Lemon, S M, Murphy, P C, Shields, P A, Ping, L H, Feinstone, S M, Cromeans, T, ...
Variants of hepatitis A virus (pHM175 virus) recovered from persistently infected green monkey kidney (BS-C-1) cells induced a cytopathic effect during serial passage in BS-C-1 or fetal rhesus kidney...
Influence of salts on electrostatic interactions between poliovirus and membrane filters.
Neither solutions of salts nor solutions of detergents or of an alcohol at pH 4 are capable of eluting poliovirus adsorbed to membrane filters. However, solutions containing both a salt, such as...
Modified membrane-filter procedure for concentration of enteroviruses from tap water.
Shields, P A, Berenfeld, S A, Farrah, S R
Enteroviruses added to 114 liters of dechlorinated tap water were recovered in a 16-ml sample by a two-stage concentration procedure in which different types of membrane filters were used in each...
Concentration of viruses in beef extract by flocculation with ammonium sulfate.
Bacteriophages and enteroviruses in water were adsorbed to positively charged filters (Virosorb 1MDS [AMF Cuno, Inc., Meriden, Conn.] or Seitz S [Republic Filters, Milldaler, Conn.]). Adsorbed...
Lemon, S M, Murphy, P C, Shields, P A, Ping, L H, Feinstone, S M, Cromeans, T, ...
Variants of hepatitis A virus (pHM175 virus) recovered from persistently infected green monkey kidney (BS-C-1) cells induced a cytopathic effect during serial passage in BS-C-1 or fetal rhesus kidney...
Influence of salts on electrostatic interactions between poliovirus and membrane filters.
Neither solutions of salts nor solutions of detergents or of an alcohol at pH 4 are capable of eluting poliovirus adsorbed to membrane filters. However, solutions containing both a salt, such as...