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Number of items at this level: 65.

2011

Vierheilig, Clemens (2011) Hochortsaufgelöste elektro-optische Charakterisierung von InGaN-GaN-LED-Strukturen. Dissertationsreihe der Fakultät für Physik der Universität Regensburg 15, PhD, Universität Regensburg

2010

Wiesmann, Christopher (2010) Nano-structured LEDs – Light extraction mechanisms and applications. Dissertationsreihe der Fakultät für Physik der Universität Regensburg 11, PhD, Universität Regensburg

2009

Braun, Harald (2009) Multidimensionale Charakterisierung der Modendynamik von (Al,In)GaN Laserdioden. Dissertationsreihe der Fakultät für Physik der Universität Regensburg 6, PhD, Universität Regensburg

2007

Witzigmann, B. and Laino, V. and Roemer, F. and Lauterbach, C. and Schwarz, Uli and Rumbolz, C. and Schillgalies, M. and Lell, A. and Härle, V. (2007) Analysis of substrate modes in GaN/InGaN Lasers. SPIE proceedings 6468, 64680Q.

Kojima, K. and Funato, M. and Kawakami, Y. and Braun, Harald and Schwarz, Uli and Nagahama, S. and Mukai, T. (2007) Comparison between optical gain spectra of InxGa1-xN/In0.02Ga0.98N laser diodes emitting at 404 nm and 470 nm. phys. stat. sol. (a) 204, p. 2108.

Braun, Harald and Lauterbach, C. and Schwarz, Uli and Laino, V. and Witzigmann, B. and Rumbolz, C. and Schillgalies, M. and Lell, A. and Härle, V. (2007) Experimental and Theoretical Study of Substrate Modes in (Al,In)GaN Laser Diodes. phys. stat. sol. (c) 4, p. 2772.

Laino, V. and Roemer, F. and Witzigmann, B. and Lauterbach, C. and Schwarz, Uli and Rumbolz, C. and Schillgalies, M. and Furitsch, M. and Lell, A. and Här, V. (2007) Experimental and theoretical study of substrate modes in (Al,In)GaN laser diodes. IEEE J. Quantum Electronics 43, p. 16.

Schwarz, Uli and Braun, Harald and Kojima, K. and Kawakami, Y. and Nagahama, S. and Mukai, T. (2007) Interplay of built-in potential and piezoelectric field on carrier recombination in green light emitting InGaN quantum wells. Applied Physics Letters 91, p. 123503.

Schwarz, Uli and Braun, Harald and Kojima, K. and Funato, M. and Kawakami, Y. and Nagahama, S. and Mukai, T. (2007) Investigation and comparison of optical gain spectra of (Al,In)GaN laser diodes emitting in the 375 nm to 470 nm spectral range. SPIE proceedings 6485, p. 648506.

Vierheilig, Clemens and Braun, Harald and Schwarz, Uli and Wegscheider, Werner and Baur, E. and Strauß, U. and Härle, V. (2007) Lateral Diffusion of Photogenerated Carriers in InGaN/GaN-heterostructures Observed by PL Measurements. phys. stat. sol. (c) 4, p. 2362.

Laubsch, A. and Sabathil, M. and Bruederl, G. and Wagner, J. and Strassburg, M. and Baur, E. and Braun, Harald and Schwarz, Uli and Lell, A. and Lutgen, S. and Linder, N. and Oberschmid, R. and Hahn, B. (2007) Measurement of the internal quantum efficiency of InGaN quantum wells. Proc. SPIE 6486, 64860J.

Swietlik, T. and Franssen, G. and Czernecki, R. and Leszczynski, M. and Skierbiszewski, C. and Grzegory, I. and Bohdan, R. and Trzeciakowski, W. and Suski, T. and Perlin, P. and Lauterbach, C. and Schwarz, Uli (2007) Mode dynamics of high power (InAl)GaN based laser diodes grown on bulk GaN substrate. Journal of Appli ed Physics 101, 083109.

Schwarz, Uli and Witzigmann, B. (2007) Nitride Semiconductor Devices. In: Optical properties of edge-emitting lasers: measurement and simulation. Wiley-VCH.

Schwarz, Uli and Kneissl, M. (2007) Nitride emitters go nonpolar. phys. stat. solidi (RRL) 1, A44.

Kojima, K. and Schwarz, Uli and Funato, M. and Kawakami, Y. and Nagahama, S. and Mukai, T. (2007) Optical gain spectra for near UV to aquamarine (Al,In)GaN laser diodes. Optics Express 15, p. 7730.

Schwarz, Uli (2007) Pattern formation and directional and spatial ordering of edge dislocations in bulk GaN: Micro-photoluminescence spectra and continuum elastic calculations. Physical Review B 75, p. 245213.

Gmeinwieser, N. and Schwarz, Uli (2007) Strain of single edge dislocations in bulk GaN. Physica Status Solidi (B).

Vierheilig, Clemens and Braun, Harald and Schwarz, Uli and Wegscheider, Werner and Baur, E. and Strauß, U. and Härle, V. (2007) Temperature- and excitation density dependency of photoluminescence spectra in InGaN/GaN-heterostructures. phys. stat. sol. (c) 4, p. 179.

2006

Flossmann, Florian (2006) Singularitäten von Phase und Polarisation des Lichts. PhD, Universität Regensburg

Sturm, Evi (2006) Optische Verstärkungsmessungen von (In, Al)GaN Diodenlasern. PhD, Universität Regensburg

Engl, Karl and Beer, Martin and Gmeinwieser, Nikolaus and Schwarz, Ulrich and Zweck, Josef and Wegscheider, Werner and Miller, S. and Miler, A. and Lugauer, H. and Brüderl, G. and Lell, A. and Härle, V. (2006) Influence of an in situ-deposited SiN_x intermediate layer inside GaN and AlGaN layers on SiC substrates. Journal of Crystal Growth 289 (1), pp. 6-13.

Witzigmann, B. and Laino, V. and Luisier, M. and Schwarz, Uli and Feicht, Georg and Wegscheider, Werner and Engl, K. and Furitsch, M. and Leber, A. and Lell, A. and Härle, V. (2006) Microscopic analysis of optical gain in InGaN/GaN quantum wells. Applied Physics Letters 88, 021104.

Witzigmann, B. and Laino, V. and Luisier, M. and Schwarz, Uli and Fischer, H. and Feicht, Georg and Wegscheider, Werner and Rumbolz, C. and Lell, A. and Härle, V. (2006) Analysis of temperature dependent optical gain in GaN/InGaN quantum well structures. IEEE Phot. Tech. Lett. 18, p. 1600.

Kojima, K. and Funato, M. and Kawakami, Y. and Nagahama, S. and Kumai, T. and Braun, Harald and Schwarz, Uli (2006) Gain suppression phenoma observed in InGaN QW laser diodes emitting at 470 nm. Applied Physics Letters 89, p. 241127.

Witzigmann, B. and Laino, V. and Luisier, M. and Feicht, Georg and Schwarz, Uli (2006) Simulation and design of optical gain in In(Al)GaN/GaN short wavelength lasers. SPIE proceedings 6184, 61840E.

Flossmann, Florian and Schwarz, Uli and Maier, Max and Dennis, M. (2006) Stokes parameters in the unfolding of an optical vortex through a birefringent crystal. Optics Express 14, p. 11402.

Schwarz, Uli and Lauterbach, C. and Schillgalies, M. and Rumbolz, C. and Furitsch, M. and Lell, A. and Härle, V. (2006) Time-resolved scanning near-field microscopy of InGaN laser diode dynamics. SPIE proceedings 6184, 61840K.

Pindl, M. and Schwarz, Uli (2006) Waveguide mode dynamics of blue laser diodes. phys. stat. sol. (a) 203, p. 1787.

2005

Schödl, Thomas (2005) Verlustmechanismen und Degradation von blauen (Al,In)GaN Laserdioden. PhD, Universität Regensburg

Manz, T. and Schwarz, Uli (2005) Erratum to: Stimulated Stokes and anti-Stokes Raman scattering in liquid acetone with a Bessel beam. Optics Communications 249, p. 363.

Schoedl, T. and Schwarz, Uli and Kümmler, V. and Furitsch, M. and Leber, A. and Miler, A. and Lell, A. and Härle, V. (2005) Facet degradation of GaN heterostructure laser diodes. Journal of Appli ed Physics 97, p. 123102.

Schwarz, Uli and Bandres, M. and Gutierrez-Vega, J. (2005) Formation of Ince-Gaussian modes in a stable laser oscillator. SPIE proceedings 5708, p. 124.

Schwarz, Uli and Pindl, M. and Sturm, Evi and Furitsch, M. and Leber, A. and Miller, S. and Lell, A. and Härle, V. (2005) Influence of ridge geometry on lateral mode stability of (In/Al)GaN laser diodes. phys. stat. sol. (a) 202, p. 261.

Flach, S. and Schwarz, Uli (2005) Lokal angeregt, ganz diskret. Physik Journal 4, p. 15.

Schwarz, Uli and Pindl, M. and Wegscheider, Werner and Eichler, C. and Scholz, F. and Furitsch, M. and Leber, A. and Miller, S. and Lell, A. and Härle, V. (2005) Near-field and far-field dynamics of (Al,In)GaN laser diodes. Applied Physics Letters 86, p. 161112.

Pindl, M. (2005) Near-field and far-field dynamics of (Al,In)GaN laser diodes. SPIE proceedings 5738, p. 229.

Flossmann, Florian and Schwarz, Uli and Maier, Max (2005) Optical vortices in a Laguerre-Gaussian LG10 beam. J. Mod. Optics 52, p. 1009.

Flossmann, Florian and Schwarz, Uli and Maier, Max and Dennis, M. (2005) Polarization singularities from unfolding an optical vortex through a birefringent crystal. Physical Review Letters 95, p. 253901.

Flossmann, Florian and Schwarz, Uli and Maier, Max (2005) Propagation dynamics of optical vortices in Laguerre-Gaussian beams. Optics Communications 250, p. 218.

Gmeinwieser, N. and Gottfriedsen, P. and Schwarz, Uli and Wegscheider, Werner and Clos, R. and Krtschil, A. and Krost, A. and Weimar, A. and Brüderl, G. and Lell, A. and Härle, V. (2005) Single dislocation induced strain in GaN. Journal of Appli ed Physics 98, p. 116102.

2004

Gmeinwieser, N. and Engl, K. and Gottfriedsen, P. and Schwarz, Uli and Zweck, Josef and Wegscheider, Werner and Miller, S. and Lugauer, H. and Leber, A. and Lell, A. and Härle, V. (2004) Correlation of strain, wing tilt, dislocation density, and photoluminescence in epitaxial lateral overgrown GaN on SiC substrate. Journal of Appli ed Physics 96, J. Appl. Phys..

Schwarz, Uli and Sturm, Evi and Wegscheider, Werner and Kümmler, V. and Lell, A. and Härle, V. (2004) Excitonic signature in gain and carrier induced change of refractive index spectra of (In,Al)GaN quantum well lasers. Applied Physics Letters 85, p. 1475.

Schoedl, T. and Schwarz, Uli and Miller, S. and Leber, A. and Furitsch, M. and Lell, A. and Härle, V. (2004) Facet degradation of (Al,In)GaN laser diodes. phys. stat. sol. (a) 201, p. 2635.

Bandres, M. and Schwarz, Uli and Gutierrez-Vega, J. (2004) Ince-Gaussian Beams: The third family of eigenmodes of stable laser resonators. Optics and Photonics News, p. 36.

Schwarz, Uli and Schoedl, T. and Kümmler, V. and Lell, A. and Härle, V. (2004) Laser Diode Facet Degradation Study. MRS Proceeding 798, Y11.10.1.

Schwarz, Uli and Wegscheider, Werner and Lell, A. and Härle, V. (2004) Nitride-based in-plane laser diodes with vertical current path. Proceedings of the SPIE 5365, p. 267.

Schwarz, Uli and Bandres, M. and Gutierrez-Vega, J. (2004) Observation of Ince-Gaussian modes in stable resonators. Optics Lett. 29, p. 1870.

Manz, T. and Schwarz, Uli (2004) Stimulated Stokes and anti-Stokes Raman scattering in liquid acetone with a Bessel beam. Optics Communications 235, p. 201.

Gmeinwieser, N. and Engl, K. and Schwarz, Uli and Zweck, Josef and Wegscheider, Werner and Miller, S. and Leber, A. and Lell, A. and Härle, V. (2004) Strain, wing tilt and Photoluminescence in ELOG GaN on SiC substrates. phys. stat. sol. (a) 201, p. 2760.

2003

Schwarz, Uli and Sturm, Evi and Wegscheider, Werner and Kümmler, V. and Lell, A. and Härle, V. (2003) Gain spectra and current-induced change of refractice index in (In/Al)GaN diode lasers. phys. stat. sol. (a) 200, p. 143.

Schwarz, Uli and Schuck, P. and Mason, M. and Grober, R. and Roskowsky, A. and Einfeldt, S. and Davis, R. (2003) Microscopic mapping of strain relaxation in uncoalesced pendeoepitaxial GaN on SiC. Physical Review B 67, p. 45321.

Schwarz, Uli and Sturm, Evi and Wegscheider, Werner and Kümmler, V. and Lell, A. and Härle, V. (2003) Optical gain, carrier-induced phase shift, and linewidth enhancement factor in InGaN quantum well lasers. Applied Physics Letters 83, p. 4095.

Schwarz, Uli and Zeitler, J. and Baier, Jürgen and Sogomonian, S. and Maier, Max (2003) Stimulated anti-Stokes Raman scattering with Bessel beams in hydrogen gas. J. Opt. Soc. Am. B 20, p. 1750.

2002

Balzer, Herbert (2002) Entwicklung und Anwendung bildgebender Verfahren für die Messung der elektrischen Feldstärke mit Hilfe der Lochbrennspektroskopie. PhD, Universität Regensburg

Kümmler, V. and Brüderl, G. and Bader, S. and Miller, S. and Weimar, A. and Lell, A. and Härle, V. and Schwarz, Uli and Gmeinwieser, N. and Wegscheider, Werner (2002) Degradation Analysis of InGaN Laser Diodes. phys. stat. sol. (a) 194, p. 419.

Bittner, B. and Scherm, M. and Schoedl, T. and Tyroller, T. and Schwarz, Uli and Maier, Max (2002) Phonon-polariton damping by low-frequency excitations in lithium tantalate investigated by spontaneous and stimulated Raman scattering. J. Phys.: Condes. Matter 14, p. 9013.

Schwarz, Uli and Sogomonian, S. and Maier, Max (2002) Propagation dynamics of phase dislocations embedded in a Bessel light beam. Optics Communications 208, p. 255.

2001

Kilger, Robert (2001) Untersuchung der Relaxation von Photofrin-generiertem Singulett-Sauerstoff in Lösungen und in vitro. PhD, Universität Regensburg

Sogomonian, S. and Schwarz, Uli and Maier, Max (2001) Phase front transformation of a first-order Bessel beam in Raman-resonant four-wave mixing. J. Opt. Soc. Am. B 18, p. 497.

Roskowsky, A. and Miraglia, P. and Preble, E. and Einfeldt, S. and Stiles, T. and Davis, R. and Schuck, J. and Grober, R. and Schwarz, Uli (2001) Strain and dislocation reduction in maskless pendeo-epitaxy GaN thin films. phys. stat. sol. (a) 188, p. 729.

2000

Schwarz, Uli and Niggl, L. and Maier, Max (2000) Gain guiding in stimulated scattering processes with hollow Bessel pump beams. Optics Communications 181, p. 413.

1999

Schwarz, Uli and English, L. and Sievers, A. (1999) Experimental Generation and Observation of Intrinsic Localized Spin Wave Modes in an Antiferromagnet. Physical Review Letters 83, p. 223.

1998

Maier, Max (1998) Damping mechanisms of phonon polaritons, exploited by stimulated Raman gain measurements. Physical Review B 58, p. 766.

1997

Schwarz, Uli and Maier, Max (1997) Asymmetric Raman lines caused by an anharmonic lattice potential in lithium niobate. Physical Review B 55, p. 11041.

1996

Maier, Max (1996) Frequency dependence of phonon-polariton damping in lithium niobate. Physical Review B 53, p. 5074.

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