Search Results - "Ibbetson, P"

Polarization effects, surface states, and the source of electrons in AlGaN/GaN heterostructure field effect transistors by Ibbetson, J. P., Fini, P. T., Ness, K. D., DenBaars, S. P., Speck, J. S., Mishra, U. K.

“…The origin of the two-dimensional electron gas (2DEG) in AlGaN/GaN heterostructure field effect transistors is examined theoretically and experimentally. Based…”
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Very-high power density AlGaN/GaN HEMTs by Yi-Feng Wu, Kapolnek, D., Ibbetson, J.P., Parikh, P., Keller, B.P., Mishra, U.K.

“…Research work focusing on the enhancement of large-signal current-voltage (I-V) capabilities has resulted in significant performance improvement for AlGaN/GaN…”
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High-performance (Al,Ga)N-based solar-blind ultraviolet p–i–n detectors on laterally epitaxially overgrown GaN by Parish, G., Keller, S., Kozodoy, P., Ibbetson, J. P., Marchand, H., Fini, P. T., Fleischer, S. B., DenBaars, S. P., Mishra, U. K., Tarsa, E. J.

“…Solar-blind ultraviolet photodiodes with a band-edge wavelength of 285 nm were fabricated on laterally epitaxially overgrown GaN grown by metalorganic chemical…”
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Microstructure of GaN laterally overgrown by metalorganic chemical vapor deposition by Marchand, H., Wu, X. H., Ibbetson, J. P., Fini, P. T., Kozodoy, P., Keller, S., Speck, J. S., DenBaars, S. P., Mishra, U. K.

“…Extended defect reduction in GaN grown by lateral epitaxial overgrowth (LEO) on large-area SiO2/GaN/Al2O3 wafers by low pressure metalorganic chemical vapor…”
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Scanning capacitance microscopy imaging of threading dislocations in GaN films grown on (0001) sapphire by metalorganic chemical vapor deposition by Hansen, P. J., Strausser, Y. E., Erickson, A. N., Tarsa, E. J., Kozodoy, P., Brazel, E. G., Ibbetson, J. P., Mishra, U., Narayanamurti, V., DenBaars, S. P., Speck, J. S.

“…A combination of atomic force microscopy and scanning capacitance microscopy was used to investigate the relationship between the surface morphology and the…”
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The pulsations of PG 1351+489 by Redaelli, M., Kepler, S. O., Costa, J. E. S., Winget, D. E., Handler, G., Castanheira, B. G., Kanaan, A., Fraga, L., Henrique, P., Giovannini, O., Provencal, J. L., Shipman, H. L., Dalessio, J., Thompson, S. E., Mullally, F., Brewer, M. M., Childers, D., Oksala, M. E., Rosen, R., Wood, M. A., Reed, M. D., Walter, B., Strickland, W., Chandler, D., Watson, T. K., Nather, R. E., Montgomery, M. H., Bischoff-Kim, A., Hansen, C. J., Nitta, A., Kleinman, S. J., Claver, C. F., Brown, T. M., Sullivan, D. J., Kim, S.-L., Chen, W.-P., Yang, M., Shih, C.-Y., Zhang, X., Jiang, X., Fu, J. N., Seetha, S., Ashoka, B. N., Marar, T. M. K., Baliyan, K. S., Vats, H. O., Chernyshev, A. V., Ibbetson, P., Leibowitz, E., Hemar, S., Sergeev, A. V., Andreev, M. V., Janulis, R., Meištas, E. G., Moskalik, P., Pajdosz, G., Baran, A., Winiarski, M., Zola, S., Ogloza, W., Siwak, M., Bognár, Zs, Solheim, J.-E., Sefako, R., Buckley, D., O'Donoghue, D., Nagel, T., Silvotti, R., Bruni, I., Fremy, J. R., Vauclair, G., Chevreton, M., Dolez, N., Pfeiffer, B., Barstow, M. A., Creevey, O. L., Kawaler, S. D., Clemens, J. C.

“…PG 1351+489 is one of the 20 DBVs - pulsating helium-atmosphere white dwarf stars - known and has the simplest power spectrum for this class of star, making it…”
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Self-assembled ErAs islands in GaAs: Growth and subpicosecond carrier dynamics by Kadow, C., Fleischer, S. B., Ibbetson, J. P., Bowers, J. E., Gossard, A. C., Dong, J. W., Palmstrøm, C. J.

“…We report the growth of self-assembled ErAs islands embedded in GaAs by molecular beam epitaxy. The nucleation of ErAs on GaAs occurs in an island growth mode…”
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Mg doping of GaN layers grown by plasma-assisted molecular-beam epitaxy by Smorchkova, I. P., Haus, E., Heying, B., Kozodoy, P., Fini, P., Ibbetson, J. P., Keller, S., DenBaars, S. P., Speck, J. S., Mishra, U. K.

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Emission mechanisms of bulk GaN and InGaN quantum wells prepared by lateral epitaxial overgrowth by Chichibu, S. F., Marchand, H., Minsky, M. S., Keller, S., Fini, P. T., Ibbetson, J. P., Fleischer, S. B., Speck, J. S., Bowers, J. E., Hu, E., Mishra, U. K., DenBaars, S. P., Deguchi, T., Sota, T., Nakamura, S.

“…The emission mechanisms of bulk GaN and InGaN quantum wells (QWs) were studied by comparing their optical properties as a function of threading dislocation…”
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Whole Earth Telescope observations of the hot helium atmosphere pulsating white dwarf EC 20058−5234 by Sullivan, D. J., Metcalfe, T. S., O'Donoghue, D., Winget, D. E., Kilkenny, D., Van Wyk, F., Kanaan, A., Kepler, S. O., Nitta, A., Kawaler, S. D., Montgomery, M. H., Nather, R. E., O'Brien, M. S., Bischoff-Kim, A., Wood, M., Jiang, X. J., Leibowitz, E. M., Ibbetson, P., Zola, S., Krzesinski, J., Pajdosz, G., Vauclair, G., Dolez, N., Chevreton, M.

“…We present the analysis of a total of 177 h of high-quality optical time-series photometry of the helium atmosphere pulsating white dwarf (DBV) EC 20058−5234…”
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High-quality coalescence of laterally overgrown GaN stripes on GaN/sapphire seed layers by Fini, P., Zhao, L., Moran, B., Hansen, M., Marchand, H., Ibbetson, J. P., DenBaars, S. P., Mishra, U. K., Speck, J. S.

“…We have characterized GaN stripes grown by lateral epitaxial overgrowth on large-area (2 in.) SiO2/GaN/Al2O3 wafers by low-pressure metalorganic chemical vapor…”
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The effect of magnetic fields on γ-ray bursts inferred from multi-wavelength observations of the burst of 23 January 1999 by Galama, T. J, Briggs, M. S, Wijers, R. A. M. J, Vreeswijk, P. M, Rol, E, Band, D, Paradijs, J. van, Kouveliotou, C, Preece, R. D, Bremer, M, Smith, I. A, Tilanus, R. P. J, Bruyn, A. G. de, Strom, R. G, Pooley, G, Castro-Tirado, A. J, Tanvir, N, Robinson, C, Hurley, K, Heise, J, Telting, J, Rutten, R. G. M, Packham, C, Swaters, R, Davies, J. K, Fassia, A, Green, S. F, Foster, M. J, Sagar, R, Pandey, A. K, Nilakshi, Yadav, R. K. S, Ofek, E. O, Leibowitz, E, Ibbetson, P, Rhoads, J, Falco, E, Petry, C, Impey, C, Geballe, T. R, Bhattacharya, D

“…Gamma-ray bursts (GRBs) are thought to arise when an extremely relativistic outflow of particles from a massive explosion (the nature of which is still…”
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High mobility two-dimensional electron gas in AlGaN/GaN heterostructures grown by plasma-assisted molecular beam epitaxy by Elsass, C. R., Smorchkova, I. P., Heying, B., Haus, E., Fini, P., Maranowski, K., Ibbetson, J. P., Keller, S., Petroff, P. M., DenBaars, S. P., Mishra, U. K., Speck, J. S.

“…High quality AlGaN/GaN heterostructures have been grown by radio-frequency plasma-assisted molecular beam epitaxy on n-type GaN templates grown on sapphire by…”
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A Whole Earth Telescope campaign on the pulsating subdwarf B binary system PG 1336−018 (NY Vir) by Kilkenny, D., Reed, M. D., O'Donoghue, D., Kawaler, S. D., Mukadam, A., Kleinman, S. J., Nitta, A., Metcalfe, T. S., Provencal, J. L., Watson, T. K., Sullivan, D. J., Sullivan, T., Shobbrook, R., Jiang, X. J., Joshi, S., Ashoka, B. N., Seetha, S., Leibowitz, E., Ibbetson, P., Mendelson, H., Meištas, E., Kalytis, R., Ališauskas, D., Martinez, P., van Wyk, F., Stobie, R. S., Marang, F., Zola, S., Krzesinski, J., Ogłoza, W., Moskalik, P., Silvotti, R., Piccioni, A., Vauclair, G., Dolez, N., Chevreton, M., Dreizler, S., Schuh, S. L., Deetjen, J. L., Solheim, J.-E., Gonzalez Perez, J. M., Ulla, A., Østensen, R., Manteiga, M., Suarez, O., Burleigh, M., Kepler, S. O., Kanaan, A., Giovannini, O.

“…We present results from a multisite (‘Whole Earth Telescope’) photometric campaign on PG 1336−018, the close eclipsing binary system containing a pulsating…”
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Cathodoluminescence mapping of epitaxial lateral overgrowth in gallium nitride by Rosner, S. J., Girolami, G., Marchand, H., Fini, P. T., Ibbetson, J. P., Zhao, L., Keller, S., Mishra, U. K., DenBaars, S. P., Speck, J. S.

“…The dislocation arrangements in gallium nitride (GaN) films prepared by lateral epitaxial overgrowth (LEO) have been studied by cathodoluminescence mapping and…”
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Whole Earth Telescope observations of the hot helium atmosphere pulsating white dwarf EC20058-5234 by Sullivan, D J, Metcalfe, T S, O'Donoghue, D, Winget, DE, Kilkenny, D, van Wyk, F, Kanaan, A, Kepler, SO, Nitta, A, Kawaler, S D, Montgomery, M H, Nather, R E, O'Brien, MS, Bischoff-Kim, A, Wood, M, Jiang, X J, Leibowitz, E M, Ibbetson, P, Zola, S, Krzesinski, J, Pajdosz, G, Vauclair, G, Dolez, N, Chevreton, M

“…We present the analysis of a total of 177h of high-quality optical time-series photometry of the helium atmosphere pulsating white dwarf (DBV) EC20058-5234…”
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Determination of tilt in the lateral epitaxial overgrowth of GaN using X-ray diffraction by Fini, P, Marchand, H, Ibbetson, J.P, DenBaars, S.P, Mishra, U.K, Speck, J.S

“…Tilt that occurs during the lateral overgrowth of GaN over an SiO 2 mask from 〈1 1̄ 0 0〉 GaN-oriented stripe openings is systematically measured using X-ray…”
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DQ Herculis in Profile: Whole Earth Telescope Observations and Smoothed Particle Hydrodynamics Simulations of an Edge-on Cataclysmic Variable System by Wood, M. A, Robertson, J. R, Simpson, J. C, Kawaler, S. D, O’Brien, M. S, Nather, R. E, Winget, D. E, Montgomery, M. H, Metcalfe, T. S, Jiang, X. J, Leibowitz, E. M, Ibbetson, P, O’Donoghue, D, Zola, S, Krzesinski, J, Pajdosz, G, Vauclair, G, Dolez, N, Chevreton, M, Sullivan, D. J, Kanaan, A, Nitta, A

“…The old nova DQ Herculis was the Whole Earth Telescope Northern Hemisphere target for the 1997 July campaign and was observed on four nights with the SARA 0.9…”
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Fluctuation Controlled Hopping of Bound Magnetic Polarons in ErAs:GaAs Nanocomposites by Schmidt, D. R., Petukhov, A. G., Foygel, M., Ibbetson, J. P., Allen, S. J.

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Mechanisms of lateral epitaxial overgrowth of gallium nitride by metalorganic chemical vapor deposition by Marchand, H., Ibbetson, J.P., Fini, P.T., Keller, S., DenBaars, S.P., Speck, J.S., Mishra, U.K.

“…We investigate the effect of growth temperature (1015–1100°C), growth duration (3–90 min), and pattern geometry on the lateral epitaxial overgrowth (LEO) of…”
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