Refereed Journal Publications:
G. Aman, M. Lysevych, H Tan, C. Jagadish, H. Schmitzer, M. Fränzl, M. Cahay, and H. P. Wagner, Lasing in Zn-doped GaAs nanowires on an iron film, Nanotechnology, 34, 445201 (2023).
C. Tu, M. Kaveh, M. Fraenzl, Q. Gao, H. Tan, C. Jagadish, H. Schmitzer, H. P. Wagner, Polarization Conversion of Light Diffracted from InP Nanowire Photonic Crystal Arrays, Adv. Optical Mater., 11, 2202342 (2023).
C. Tu, M. Kaveh, M. Fraenzl, Q. Gao, H. Tan, C. Jagadish, H. Schmitzer, H. P. Wagner, Unique reflection from birefringent uncoated and gold-coated InP nanowire crystal arrays, Optics Express, 30, 3171 (2022).
G. Aman, F. Mohammadi, M. Lysevych, H. Tan, C. Jagadish, M. Fraenzl, H. Schmitzer, M. Cahay, H. P. Wagner, Effect of Au substrate and coating on the lasing characteristics of GaAs nanowires, Scientific Reports, 11, 21378 (2021).
C. Tu, M. Fraenzl, Q. Gao, H. Tan, C. Jagadish, H. Schmitzer, H. P. Wagner, Lasing from InP Nanowire Photonic Crystals on InP Substrate, Adv. Optical Mater. 9, 2001745 (2021).
J. Thompson, F. Albalawi, N. Wickremasinghe, G. Salvan, D. R. T. Zahn, H. Schmitzer, and H. P. Wagner, Index matching in multilayered organic waveguides, J. of Phys.: Cond. Matter, 32, 485702 (2020).
J. Thompson, G. Braun, D. Tierney, L. Wessels, H. Schmitzer, B. Rossa, H. P. Wagner, W. Dultz, Rosalind Franklin’s X-ray photo of DNA as an undergraduate optical diffraction experiment, Am. J. Phys. 86, 95 (2018).
F. Mohammadi, H. Schmitzer, G. Kunert, D. Hommel, J. Ge, G. Duscher, W. Langbein, and H. P. Wagner, Emission dynamics of hybrid plasmonic gold/organic GaN nanorods , Nanotechnology 28, 505710 (2017).
H. P. Wagner, M. Kaveh, Q. Gao, H. Tan, C. Jagadish, W. Langbein, Population dynamics of excitons and electron-hole pairs in polytype wurtzite/zincblende InP nanowires, Phys. Rev. B 95, 045305, (2017).
M. Kaveh, Q. Gao, C. Jagadish, J. Ge, G. Duscher, and H. P. Wagner, Controlling the exciton emission of gold coated GaAs-AlGaAs core-shell nanowires with an organic spacer layer, Nanotechnology 27, 485204 (2016).
A. Dongol, J. Thompson, X. Wang, H. Schmitzer, D. Tierney and H. P. Wagner, Real-time contrast-enhanced holographic imaging using phase coherent photorefractive quantum wells, Optics Express 23, 12795 (2015).
M. Kaveh, O. Dyck, G. Duscher, Q. Gao, C. Jagadish, H. P. Wagner, Exciton emission from hybrid organic and plasmonic polytype InP nanowire heterostructures, Mater. Res. Express 2, 045001 (2015).
N. Wickremasinghe, J. Thompson, X. Wang, H. Schmitzer, H. P. Wagner, Controlling guided modes in organic waveguides with embedded metal films, J. Appl. Physics 117, 213102 (2015).
M. E. Sadat, Masoud Kaveh Baghbador, Andrew W. Dunn, H. P. Wagner, Rodney C. Ewing, Jiaming Zhang, Hong Xu, Giovanni M. Pauletti, David B. Mast, and Donglu Shi, Photoluminescence and photothermal effect of Fe3O4 nanoparticles for medical imaging and therapy, Appl. Phys. Lett. 105, 091903 (2014).
N. Wickremasinghe, X. Wang, H. Schmitzer, H. P. Wagner, Eliminating thermal effects in z-scan measurements of PTCDA films, Optics Express 22, 23955 (2014).
A. M. Ajward, X. Wang, N. Wickremasinghe, L. A. A. DeSilva, and H. P. Wagner, Radiative recombination of trapped excitons in Alq3 films: Importance of intermolecular interactions, Phys. Rev. B 88, 045205 (2013).
H. P. Wagner, H. Schmitzer, J. Lutti, P. Borri, W. Langbein, Effects of uniaxial pressure on polar whispering gallery modes in microspheres, J. Appl. Phys. 113, 243101 (2013).
A. Kabir, H. P. Wagner, Influence of electron density and trion formation on the phase-coherent photorefractive effect in ZnSe quantum wells, Phys. Rev. B 83, 125305 (2011).
A. Kabir, A. Dongol, X. Wang, H. P. Wagner, Real-time single-shot three-dimensional and contrast-enhanced optical coherence imaging using phase coherent photorefractive quantum wells, Appl. Phys. Lett., 97, 251116 (2010).
V. R. Gangilenka, L. V. Titova, L. M. Smith, H. P. Wagner, L. A. A. DeSilva, R. Scholz, Selective excitation of exciton transitions in PTCDA crystals and films, Phys. Rev. B 81, 155208 (2010).
A. Kabir, A. M. Ajward, H. P. Wagner, Holographic imaging using the phase coherent photorefractive effect in ZnSe quantum wells, Appl. Phys. Lett. 93, 063504 (2008).
H. Mu, D. Klotzkin, A. DeSilva, H. P. Wagner, D. White, B. Sharpton, Temperature dependence of electron mobility, electroluminescence and photoluminescence of Alq3 in OLED, J. Phys. D: Appl. Phys. 41, 235109, (2008).
V. R. Gangilenka, A. DeSilva, H. P.Wagner, R. E. Tallman, B. A. Weinstein, R. Scholz, Exciton Emission in PTCDA Thin Films under Uniaxial Pressure, Phys. Rev. B 77, 115206 (2008).
S. Tripathy and H. P. Wagner, A. Ueta and D. Hommel, Coherent Exciton-LO-Phonon Polarons in ZnSe Quantum Wells with Strong Confinement, Phys. Rev. B 75, 245316 (2007). Selected for the July 2007 issue of Virtual Journal of Ultrafast Science.
P. Bajracharya, T. A. Nguyen, S. Mackowski, L. M. Smith, H. P. Wagner, U. W. Pohl, D. Bimberg, M. Strassburg, Relaxation dynamics in a bimodal CdSe quantum dot distribution, Phys. Rev. B 75, 035321 (2007). Selected for the February 2007 issue of Virtual Journal of Ultrafast Science.
H. P. Wagner, S. Tripathy, P. Bajracharya, H.-P. Tranitz, Spectral and thermal dependence of exciton induced photorefraction in ZnSe single quantum wells, Phys. Rev. B 73, 085318 (2006). Selected for the March 2006 issue of Virtual Journal of Ultrafast Science.
H. P. Wagner, A. DeSilva, V. R. Gangilenka, T. U. Kampen, Modified charge transfer emission in PTCDA/Alq3 layer structures, J. Appl. Phys. 99, 024501 (2006).
H. P. Wagner, V. R. Ganglienka, A. DeSilva, H. Schmitzer, R. Scholz, T. U. Kampen, Exciton absorption in PTCDA films, PTCDA/Alq3 multilayers and codeposited films, Phys. Rev. B 73, 125323 (2006). Selected for the April 3, 2006 issue of Virtual Journal of Nanoscale Science & Technology.
T. S. Shamirzaev, A. I. Toropov, A. K. Bakarov, K. S. Zhuravlev, A. Y. Kobitski, H. P. Wagner, D. R. T. Zahn, Exciton-polariton transition induced by elastic exciton-exciton collisions in ultrahigh quality AIGaAs alloys, Semiconductors 40, 527 (2006).
H. P. Wagner, S. Tripathy, H.-P. Tranitz, W, Langbein, Phase coherent photorefractivity in ZnSe single quantum well, Phys. Rev. Lett. 94, 147402 (2005). Selected for the April 25, 2005 issue of Virtual Journal of Nanoscale Science & Technology.
R. E. Tallman, B. A. Weinstein, A. DeSilva, H. P. Wagner, Effects of high pressure on the photoluminescence transitions of excitons in α-PTCDA crystals, phys. stat. sol. (b) 241, 3334 (2004).
H. P. Wagner, A. De Silva, T. U. Kampen, Exciton emission in PTCDA Films and PTCDA/Alq3 Multilayers, Phys. Rev. B 70, 235201 (2004). Selected for the January 2005 issue of Virtual Journal of Ultrafast Science.
H. P. Wagner, S. Tripathy, Dephasing of coherences between σ + and σ - exciton states in a ZnSe quantum well, Phys. Rev. B 69, 125325 (2004). Selected for the April 2004 issue of Virtual Journal of Ultrafast Science and for the March 29, 2004 issue of Virtual Journal of Nanoscale Science & Technology.
H. P. Wagner, S. Tripathy, Dephasing of interacting σ + and σ - excitons in a ZnSe quantum well, phys. stat. sol. (b), 241, 583 (2004).
R. Scholz, M. Schreiber, I. Vragovic, A. Yu Kobitski, H. P. Wagner, D.R.T. Zahn, Influence of exciton transfer on the optical cycle of PTCDA, J. of Luminescence 108, 121 (2004).
R. Scholz, A. Yu.Kobitski, I. Vragovic, H. P. Wagner, D.R.T. Zahn, Time resolved photoluminescence in in α-PTCDA single crystals: Evidence for recombination via Frenkel excitons, charge transfer states and excimers, Organic electronics 5, 99 (2004).
A.Yu Kobitski, R. Scholz, D. R. T. Zahn, H. P. Wagner, Time-resolved photoluminescence study of excitons in α-PTCDA at various temperatures, Phys. Rev. B 68, 155201 (2003). Selected for the November 2003 issue of Virtual Journal of Ultrafast Science.
A.Yu Kobitski, R. Scholz, G. Salvan, T. U. Kampen, H. P. Wagner, D. R. T. Zahn, Time-resolved photoluminescence study of excitons in thin PTCDA films at variable temperature, Appl. Surf. Science, 212-213, 428 (2003).
H.-P. Tranitz, H. P. Wagner, R. Engelhardt, U.W. Pohl, D. Bimberg, Thermal redistribution and dephasing of localized excitons in CdSe/ZnSSe quantum dot structures, Phys. Rev. B 65, 35325 (2002).
A.Yu Kobitski, R. Scholz, I. Vragovic, H. P. Wagner, D. R. T. Zahn, Low temperature time-resolved photoluminescence characterisation of 3,4,9,10-perylene tetracarboxylic dianhydride crystals, Phys. Rev B 66, 153204 (2002). Selected for the November 2002 issue of Virtual Journal of Ultrafast Science.
H. Schmitzer, H. P. Wagner, M. Kühnelt, W. Dultz, Phase Matched Third Harmonic Generation in Mercury-(I)-Chloride, Appl. Optics – LP 41, 470 (2002).
H. P. Wagner, H.-P. Tranitz, M. Reichelt, T. Meier, S. W. Koch, Coherent oscillations in multi-wave-mixing due to higher-order Coulomb correlations, phys. stat. sol. (a), 190, 843 (2002).
A. Yu. Kobitski, G. Salvan, R. Scholz, D. Tenne, T. U. Kampen, H. P. Wagner, and D. R. T. Zahn, Raman spectroscopy of the PTCDA - inorganic semiconductor interface: Evidence for charge transfer?, Appl. Surf. Science 190, 386 (2002).
R. Scholz, I. Vragovic, A. Yu Kobitski, M. Schreiber, H. P. Wagner, D. R. T. Zahn, Frenkel Exciton Model of Low Temperature Photoluminescence in α-PTCDA Single Crystals, phys. stat. sol. (b) 234, 402 (2002).
H. P. Wagner, H.-P. Tranitz, W. Langbein, J. M. Hvam, G. Bacher, T. Kümmell, A. Forchel, Biexciton binding energy in ZnSe quantum wells and quantum wires, phys. stat. sol (b), 231, 11 (2002).
T. S. Shamirzaev, A. L. Sokolov, K.S. Zhuravlev, A. Yu. Kobitski, H. P. Wagner, D. R. T. Zahn, Reduce of concentration of nonradiative recombination centers in CF4 plasma, Semiconductors 36, 81 (2002).
H. P. Wagner, H.-P. Tranitz, M. Reichelt, T. Meier, S. W. Koch, Coherent spectral oscillations in multi wave mixing, Phys. Rev. B. 64, 223303 (2001).
H. P. Wagner, H.-P. Tranitz, R. Schuster, G. Bacher, A. Forchel, Biexciton binding energy and exciton-LO-phonon scattering in ZnSe quantum wires, Phys. Rev. B 63, 155311 (2001).
T.S. Shamirzaeva, K.S. Zhuravleva, A.Yu. Kobitskia, H. P. Wagner, and D.R.T. Zahn, Passivation of growth defects in GaAs/AlGaAs multiple quantum well structures by CF4 plasma, Physica B 308-310, 761 (2001).
A.Yu. Kobitski and K.S. Zhuravlev, H. P. Wagner, D. R. T. Zahn, Self-trapped exciton recombination in silicon nanocrystals, Phys. Rev. B 63, 115423 (2001).
A. Yu. Kobitski, G. Salvan, H. P. Wagner, D. R. T. Zahn, Time-resolved photoluminescence characterisation of thin PTCDA films on Si(100), Appl. Surf. Science 179, 209 (2001).
G. Salvan, C. Himcinschi, A. Yu. Kobitski, M. Friedrich, H. P. Wagner T. U. Kampen, and D. R. T. Zahn, Crystallinity of PTCDA films on silicon derived via optical spectroscopic measurements, Appl. Surface Science, 175-176, 363 (2001).
H. P. Wagner, H.-P. Tranitz, R. Schuster, R. Engelhardt, U. W. Pohl, D. Bimberg, Thermal activation and phase relaxation of excitons in multiple layered CdSe/ZnSSe island structures, phys. stat. sol. (b), 224, 195 (2001).
H. P. Wagner, M. Kühnelt, H. Wenisch, D. Hommel, Band offset determination using continuous wave two-photon excitation in a ZnSe quantum well waveguide structure, Phys. Rev. B 63, 235319 (2001).
H. P. Wagner, H.-P. Tranitz, R. Schuster, Temperature Dependent Dephasing of Excitons and Trions in a ZnMgSe/ZnSe Single Quantum Well, phys. stat. sol. (b) 221, 499 (2000).
H. P. Wagner, H.-P. Tranitz, H. Preis, W. Langbein and J. M. Hvam, Interaction and Dephasing of Excitons in CdSe/ZnSe Islands, J. Cryst. Growth, 214-215, 747 (2000).
H.-P. Tranitz, R. Schuster and H. P. Wagner, Dephasing of Negatively Charged Excitons in ZnMgSe/ZnSe Single Quantum Wells, J. Cryst. Growth, 214-215, 842 (2000).
H. P. Wagner, H.-P. Tranitz, H. Preis, W. Langbein, K. Leosson, J. M. Hvam, Exciton dephasing and biexciton binding in CdSe/ZnSe islands, Phys. Rev. B 60, 10640 (1999).
H. P. Wagner, W. Langbein, J. M. Hvam, Arthur L. Smirl, Interaction induced effects in the nonlinear coherent response of quantum well excitons, Phys. Rev. B 60, 4454 (1999).
H. P. Wagner, W. Langbein, J. M. Hvam, Mixed biexcitons in single quantum wells, Phys. Rev. B 59, 4584 (1999).
M. Kühnelt, T. Leichtner, S. Kaiser, B. Hahn, H. P. Wagner, D. Eisert, G. Bacher, A. Forchel, Quasi-Phase Matched Second Harmonic Generation in ZnSe Waveguide Structures Modulated by Focused Ion Beam Implantation, Appl. Phys. Lett. 73, 584 (1998).
H. P. Wagner, A. Schätz, R. Maier, W. Langbein, J. M. Hvam, Interaction induced dephasing of excitons in wide ZnSe/ZnMgSe single quantum wells, Journal Physica E 2, 82 (1998).
A. Schätz, H. P. Wagner, R. Maier, H. Preis, T. Frey, T. Reisinger, W. Gebhardt, W. Langbein, J. M. Hvam, Coherent phenomena and interaction of excitons in wide ZnSe/ZnMgSe single quantum wells, J. Cryst. Growth 184-185, 672 (1998).
M. Kühnelt, L. Reindl, E. Griebl , B. Hahn, S. Kaiser, M. Kastner, H. Preis, T. Frey, T. Reisinger, H. P. Wagner and W. Gebhardt, Ternary II-VI compounds for optical waveguides, J. Cryst. Growth 184-185, 1165 (1998).
H. P. Wagner, M. Kühnelt, W. Langbein, J. M. Hvam, Dispersion of the Second Order Non-linear Susceptibility in ZnTe, ZnSe and ZnS, Phys. Rev. B 58, 10494 (1998).
M. Kühnelt and H. P. Wagner, Absolute Measurements of the Second Order Susceptibilities of ZnSe, ZnTe and ZnS, J. Nonl. Opt. Phys. and Mat., 7(4), 553 (1998).
H. P. Wagner, W. Langbein, J. M. Hvam, G. Bacher, T. Kümmell, A. Forchel, Exciton dephasing in ZnSe quantum wires, Phys. Rev. B 57, 1797 (1998).
H. P. Wagner, R. Maier, A. Schätz, W. Langbein, J. M. Hvam, Interaction and dephasing of centre-of-mass quantized excitons in wide ZnSe/ZnMgSe quantum wells, Phys. Rev. B 57, 1791 (1998).
H. P. Wagner, A. Schätz, R. Maier, W. Langbein, J. M. Hvam, Coherent optical properties and phase relaxation of quasi-3D and quasi-2D excitons in ZnSe/ZnSxSe1-x structures, Phys. Rev. B 56, 12581 (1997).
H. P. Wagner, M. Kühnelt, G. Wein, W. Gebhardt, D. Eisert, G. Bacher, A. Forchel, Phase matched second harmonic generation using a c(2) modulated ZnTe/ZnSe optical waveguide, J. Luminescence 72-74, 87 (1997).
H. P. Wagner, J. Lehmann, B. Hahn, Dephasing of Excitons in ZnSe and ZnSe/ZnSxSe1-x Quantum Wells, J. Luminescence 66 & 67, 84 (1996).
H. P. Wagner, J. Lehmann, B. Hahn, Dephasing and Quantum Beat of Excitons in a ZnSe/ZnSSe Layer Structure, Solid State Electronics 40, 745 (1996).
W. S. Kuhn, A. Lusson, S. Bauer, K. Wolf, M. Wörz, T. Reisinger, A. Rosenauer, H. P. Wagner, H. Dumond, B. Qo'Hen, H. Stanzl, C. Grattepain, O. Gorochov, W. Gebhardt, The Metal Organic Vapour Phase Epitaxy of ZnTe: Correlation of Growth and Layer Properties, Progress in Crystal Growth and Characterisation, 1-2, 119 (1995).
H. P. Wagner, S. Wittmann, H. Schmitzer and H. Stanzl, Phase matched second harmonic generation using thin film ZnTe optical waveguides, J. Appl. Phys., 77 (8), 3637 (1995).
H. P. Wagner, Second Harmonic Generation in Thin Film II-VI Optical Waveguides, phys. stat. sol. (b) 187 (2), 363 (1995).
C. M. Sotomayor-Torres, A. Ross, Y. S. Tang, A. Ribayrol, S. Thoms, A. S. Bunting, H. P. Zhou, H. McLelland, H. P. Wagner, B. Lunn and D. E. Ashenford, Nanofabrication of II-VI semiconductor quantum wires and dots, Material Science Forum 182-184, 87 (1995).
H. P. Wagner, S. Wittmann, H. Schmitzer and H. Stanzl, Phase Matched Second Harmonic Generation in ZnTe Optical Waveguides, Material Science Forum 182-184, 319 (1995).
H. P. Wagner, S. Festner, H. Stanzl, G. Kudlek and N. Presser, High-density and optical nonlinearity effects in epitaxially grown ZnTe Layers, Adv. Mat. for Optics and Electronics 3, 33 (1994).
K. Wolf, H. Stanzl, A. Naumov, H. P. Wagner, W. Kuhn, B. Hahn, W. Gebhardt, Growth and doping of ZnTe and ZnSe epilayers with metalorganic vapour phase epitaxy, J. of Cryst. Growth 138, 412 (1994).
K. Wolf, A. Naumov, H. P. Wagner, F. Gilg, H. Sahin, H. Stanzl, W. Gebhardt, Resonant photoluminescence and excitation spectroscopy on donor and acceptor states in doped ZnTe epilayers, J. Luminescence 60&61, 544 (1994).
K. Wolf, M. Wörz, H. P. Wagner, W. Kuhn, A. Naumov and W. Gebhardt, Growth and photoluminescence investigations of phosphorus- and iodine-doped MOVPE ZnTe layers, J. of Cryst. Growth 126, 643 (1993).
H. P. Wagner, S. Lankes, K. Wolf, M. Wörz, T. Reisinger, A. Naumov, W. Kuhn, H. Stanzl and W. Gebhardt, Resonant photoluminescence measurements in As- and P-doped ZnTe epilayers, Physica B 185, 169 (1993).
A. Naumov, K.Wolf, T. Reisinger, H. Stanzl, H. P. Wagner and W. Gebhardt, Luminescence from structural defects in heteroepitaxial MOVPE-grown ZnTe, Physica B 185, 250 (1993).
H. P. Wagner, S. Lankes, K. Wolf, D. Lichtenberger, W. Kuhn, P. Link and W. Gebhardt, Resonant excitation of intrinsic and shallow trap luminescence in MOVPE grown ZnTe layers, J. Luminescence 52, 41 (1992).
M. Lindner, G. F. Schötz, P. Link, H. P. Wagner, W. Kuhn and W. Gebhardt, Investigation of the hydrostatic pressure dependence of the E0 Gap, the excitonic binding energy and the refractive index of MOCVD grown ZnTe layers, J. Phys. Condens. Matter 4, 6401 (1992).
H. P. Wagner, S. Lankes, K. Wolf, W. Kuhn, P. Link and W. Gebhardt, Spectroscopic investigations of donor and acceptor states in n- and p-doped ZnTe-epilayers, J. Cryst. Growth 117, 303 (1992).
S. Bauer, A. Rosenauer, J. Skorsetz, W. Kuhn, H. P. Wagner, J. Zweck and W. Gebhardt, Investigation of Strained ZnTe Epilayers by High Resolution Electron Microscopy, J. Cryst. Growth 117, 297 (1992).
M. A. Foad, A. P. Smart, M. Watt, C. M. Sotomayor Torres, W. Kuhn, H. P. Wagner, H. Leiderer, S. Bauer, C.D.W. Wilkinson, W. Gebhardt and M. Razeghi, Optical assessment of reactive ion etched ZnTe and ZnSe for nanostructures, Surf. Sci. 267, 223 (1992).
W. Kuhn, A. Naumov, H. Stanzl, S. Bauer, K. Wolf, H. P. Wagner, W. Gebhardt, U. W. Pohl, A. Krost, W. Richter, U. Dümichen, K. H. Thiele, Low temperature MOVPE growth of ZnSe with ditertiarybutylselenide, J. Cryst. Growth 123, 605 (1992).
M. A. Foad, M. Watt, A.P. Smart, C. M. Sotomayor-Torres, C.D.W. Wilkinson, W. Kuhn, H. P. Wagner, S. Bauer and W. Gebhardt, High resolution dry etching of ZnTe: characterisation of etched surfaces by x-ray photoelectron spectroscopy, photoluminescence and Raman scattering, Semicond. Sci. Technol. 6, A 115 (1991).
H. Leiderer, G. Jahn, M. Silberbauer, W. Kuhn, H. P. Wagner, W. Limmer and W. Gebhardt, Investigation of strain in metalorganic vapor-phase epitaxy grown ZnTe layers by optical methods, J. Appl. Phys. 70, 398 (1991).
M. Lindner, G. F. Schötz, H. P. Wagner, W. Kuhn, W. Gebhardt, Pressure dependence of the absorption edge at the E0 gap of MOCVD grown ZnTe films, High Pressure Research 8, 412 (1991).
H. P. Wagner, W. Kuhn and W. Gebhardt, Photoluminescence properties of MOVPE grown ZnTe layers on (100) GaAs and (100) GaSb, J. Cryst. Growth 101, 199 (1990).
H. P. Wagner, W. Prettl, Metastable shallow donor states of n-GaAs in a magnetic field, Sol. State Commun. 66, 867 (1988).
Conference Proceedings & Abstracts
G. Aman, M. Fränzl, M. Lysevych, H. Tan, C. Jagadish, H. Schmitzer, M. Cahay, H. P. Wagner, Lasing from GaAs Nanowires on Fe Films, Int. Conf. “Frontiers in Optics”, Washington D.C., paper JTu1A.77 (2021).
G. Aman, F. Mohammadi, M. Lysevych, H. Tan, C. Jagadish, H. Schmitzer, M. Fraenzl, M. Cahay, and H. P. Wagner, Hybrid Plasmonic Lasing from Zinc-Doped GaAs Nanowires up to Room Temperature, Int. Conf. “Frontiers in Optics”, Washington D.C., paper JW3A.55 (2019).
H.P. Wagner, Bridging Nanophotonics and Plasmonics: Exploring Light-Matter Interaction in Hybrid Plasmonic Metal/Semiconductor Nanowires, Abstract at the Int. Conf. “Optoelectronics 2018”, Philadelphia, PA, 2018.
H. P. Wagner, F. Mohammadi, L. Mykhaylo, H. Tan, J. Chennupati, H. Schmitzer, M. Fraenzl, Hybrid-Plasmonic GaAs Nanowire Lasers, Abstract at the ICPS 34, Montpellier, France, 2018.
H. P. Wagner, C. Tu, G. Qian, H. Tan, J. Chennupati, K. Masoud, M. Fraenzl, H. Schmitzer, Light Reflection from Bare and Plasmonic InP Nanowire Arrays, Abstract at the ICPS 34, Montpellier, France, 2018.
F. Mohammadi, L. Mykhaylo, H. Tan, J. Chennupati, M. Fraenzl, and H. P. Wagner, Hybrid-plasmonic gold coated GaAs nanowire lasers, CLEO conference, San Jose, CA, paper JTh2A.51 (2018).
F. Mohammadi, M Lysevych, H. Tan, C. Jagadish, H. P. Wagner, Metal-enhanced lasing from zinc-doped GaAs nanowires, OSA conference Frontiers in Optics (FiO) & Laser Applications (LS), Washington, DC, paper JTu3A.49, (2017).
M. F. Chisholm, J. Ge, M. Tian, H. P. Wagner, G. Duscher, Mapping giant oscillator excitons in semiconducting nanowires, Proc. of Int. conference on Microscopy and Microanalysis, St. Louis 2017, Microscopy and Microanalysis 23(S1):374-375 (2017).
H. P. Wagner, F. Mohammadi, H. Schmitzer, G. Kunert, D. Hommel, G. Duscher, J. Ge, Exciton emission from bare and plasmonic Alq3/gold coated GaN nanorods, Abstract at the 32nd Int. Conf. on Semiconductors (ICPS 33), Beijing, China, 2016.
H. P. Wagner, M. Kaveh, Q. Gao, C. Jagadish, G. Duscher, J. Ge, Exciton emission from organic-plasmonic GaAs-AlGaAs-GaAs nanowire heterostructures, Abstract at the 32nd Int. Conf. on Semiconductors (ICPS 33), Beijing, China, 2016.
H. P. Wagner, M. Kaveh, F. Mohammadi, H. Schmitzer, Q. Gao, C. Jagadish, G. Kunert, D. Hommel, J. Ge, G. Duscher, Exciton emission from Plasmonic-Organic-III-V-Semiconductor nanowires and nanorods, Proc. of the Int. Progress in Electromagnetic Research Symposium (PIERS) 2016, Shanghai, China, © IEEE, pp. 1846, 2016.
M. Kaveh, O. Dyck, G. Duscher, Q. Gao, C. Jagadish, H. P. Wagner, Characteristics of guided modes in plasmonic metal/aluminum-quinoline multilayer waveguides, Abstract at the International „Progress in Electromagnetic Research Symposium“ (PIERS), Prague, Czech Republic, 2015.
N. Wickremasinghe, J. Thompson, X. Wang, H. Schmitzer, H. P. Wagner, Exciton Emission from Plasmonic Metal/Organic Multishell Semiconductor Nanowires, Abstract at the International „Progress in Electromagnetic Research Symposium“ (PIERS), Prague, Czech Republic, 2015.
H. P. Wagner, N. Wickremasinghe, M. Kaveh, M. Ajward, X. Wang, H. Schmitzer, Q. Gao, C. Jagadish, Optical properties of Alq3 films and Alq3/plasmonic heterostructures, Proc. of SPIE, San Diego Vol. 9181, 91810P-1-9 (2014).
H. P. Wagner, M. Kaveh, W. Langbein, Q. Gao, C. Jagadish, G. Duscher, Population Dynamics of Electron-Hole Pairs in Polytype Wurtzite-Zincblende InP Nanowires, Abstract at the 32nd Int. Conf. on Semiconductors (ICPS 32), Austin, 2014.
M. Kaveh, Q. Gao, C. Jagadish, G. Duscher and H. P. Wagner, Dynamics of Excitons in Bare and Coated Plasmonic InP Nanowires, Abstract at the 32nd Int. Conf. on Semiconductors (ICPS 32), Austin, 2014.
A. M. Ajward, X. Wang, and H. P. Wagner, Intensity and temperature-dependent photoluminescence of tris (8-hydroxyquinoline) aluminum films, Proc. of the 31st Int. Conf. on Semiconductors (ICPS 31), Zurich, 2012, 1566,179 (2013).
A. Dongol, H. P. Wagner, Electron transfer and capture dynamics in ZnSe quantum wells grown on GaAs, Proc. of the 31st Int. Conf. on Semiconductors (ICPS 31), Zurich, 2012, 1566, 478 (2013).
A. Dongol, A. Kabir, X. Wang, H. Schmitzer, D. Tierney and H. P. Wagner, Contrast-enhanced holography using phase coherent photorefractive quantum wells, Proc. of the Topical Meeting "Photorefractive Materials, Effects, and Devices, Control of Light and Matter" in Ensada (Mexico), October 13-15, 2011.
A. Dongol, H. P. Wagner, Transfer and capture of electrons in ZnSe quantum wells grown on GaAs, Abstracts of the Int. Conference on Fundamental Optical Processes in Semiconductors (FOPS), Lake Janaluska, North Carolina, 2011.
A. Kabir, A. Dongol, X. Wang, H. P. Wagner, Depth-resolved and contrast enhanced optical coherence imaging using phase coherent photorefractive quantum wells, Proc. of the 30th Int. Conf. on Semiconductors (ICPS 30), Seoul, Korea, 2010, 1399, 987 (2011).
A. Kabir, H. P. Wagner, Excitation energy and temperature dependence of the phase coherent photorefractive effect, Proc. of the 30th Int. Conf. on Semiconductors (ICPS 30), Seoul, Korea, 2010, 1399, 461 (2011).
A. Kabir, A. M. Ajward, H. P. Wagner, Time-resolved 3D holographic imaging using phase coherent photorefractive ZnSe quantum wells, Proc. of the Topical Meeting "Photorefractive Materials, Effects, and Devices, Control of Light and Matter" in Bad Honnef (Germany), June 11-14, 2009.
A. Kabir, M. Panfilova, A. Pawlis, H. P. Wagner, K. Lischka, Well width dependence of the phase coherent photorefractive effect in ZnSe quantum wells, Proc. of the E-MRS 2008, Strasbourg, Microelectronics Journal 40, 303 (2009).
R. Scholz, L. Gisslen, V. R. Gangilenka, L. V. Titova, L. M. Smith, H. P. Wagner, Interference of Frenkel and charge transfer (CT) states: Absorption, photoluminescence, and photoluminescence excitation spectra of perylene compounds, Material Science and Engineering (MSE), Nürnberg, Germany, Sept. 1-4, 2008.
A. Kabir, A. M. Ajward, and H. P. Wagner, Time- and Depth-Resolved Optical Coherence Imaging Using Phase Coherent Photorefractive Quantum Wells, Proc. of 29th Int. Conf. on Semiconductors (ICPS 29), Rio de Janeiro, Brazil, 2008, (p. 487).
P. Bajracharya, A. Kabir, S. Tripathy, and H. P. Wagner, Phase Coherent Photorefractive Effect in ZnSe Quantum Wells, Abstracts of the Conference on Fundamental Optical Processes in Semiconductors (AMFOPS), Big Sky, Montana, 2007, (p.109).
S. Tripathy, A. Ueta, D. Hommel, and H. P. Wagner, Exciton-LO-Phonon Coherences in ZnSe Quantum Wells, Abstracts of the Conference on Fundamental Optical Processes in Semiconductors (AMFOPS), Big Sky, Montana, 2007, (p.110).
V. Gangilenka, A. DeSilva, H. P. Wagner, H. Schmitzer, R. Scholz, T. U. Kampen, Absorption of Frenkel Excitons in PTCDA thin films, in PTCDA/Alq3 multilayers and in co-deposited films, Proc. of 28th Int. Conf. on Semiconductors (ICPS 28), Vienna, Austria, 2006, (p.357).
S. Tripathy, P. Bajracharya, H. P. Wagner, Phase coherent photorefractive effect in ZnSe quantum wells using ultrashort pulses, Proc. of 28th Int. Conf. on Semiconductors (ICPS 28), Vienna, Austria, 2006, (p.1459).
S. Tripathy, P. Bajracharya, H. P. Wagner, Dephasing of excitons in ZnSe quantum wells using ultra-short excitation pulses, Proc. of 28th Int. Conf. on Semiconductors (ICPS 28), Vienna, Austria, 2006, (p.419).
H. P. Wagner, S. Tripathy, P. Bajracharya, Exciton resonant phase coherent photorefractivity in ZnSe quantum wells, Abstracts of the 9th Int. Conference on Optics of Excitons in Confined Systems (OECS9) Southhampton, U.K., 2005.
H. P. Wagner, S. Tripathy, Exciton induced phase coherent photorefraction in ZnSe single quantum well, Proc. of the 10th Int. Conference on Photorefraction, Hainan, China, TOPS Proceedings: Photorefractive Effects, Materials and Devices, Editors: G. Zhang, D. Kip, D. Nolte, J. Xu, Vol. 99, pp. 8-13, 2005.
H. P. Wagner, A. DeSilva, T. U. Kampen, Exciton emission in thin PTCDA films and PTCDA/Alq3 multilayers, Abstracts at the Great Lakes Photonic Symposium, SPIE, Cleveland, Ohio, 2004.
H. P. Wagner, S. Tripathy, Effective exciton induced photorefractive effect in ZnMgSe/ZnSe quantum wells, Abstracts at the Great Lakes Photonic Symposium, SPIE, Cleveland, Ohio, 2004.
H. P. Wagner, A. DeSilva, T. U. Kampen, Absorption and emission in thin PTCDA films and PTCDA/Alq3 multilayers, Proc. of 27th Int. Conf. on Semiconductors (ICPS 27), Flagstaff, Arizona, 2004, AIP Conference Proceedings: Physics of Semiconductors, Editors: J. Menendes, C.G. Van der Walle, Vol. 772, pp. 1097-98, 2005.
C. Starr, H. P. Wagner, K. Dholakia, W. Dultz, H. Schmitzer, Optically controlled rotation of organic semiconductor PTCDA crystals in optical Tweezers, Presented at 27th Int. Conf. on Semiconductors (ICPS 27), Flagstaff, Arizona, 2004. AIP Conference Proceedings: Physics of Semiconductors, Editors: J. Menendes, C.G. Van der Walle, Vol. 772, pp. 1099-1100, 2005.
H. P. Wagner, A. DeSilva, T. U. Kampen, Exciton emission in thin PTCDA films and PTCDA/Alq3 multilayers, Proc. of Hawaii International Conference, Honolulu, Hawaii, 2004.
H. P. Wagner, H.-P. Tranitz, R. Englhardt, U. W. Pohl, D. Bimberg, Polarisation dependent dephasing of excitons in CdSe/ZnSSe quantum island structures, Proc. of 26th Int. Conf on the Physics of Semiconductors, ICPS 26, Edinburgh, UK, 2002.
H. Schmitzer, H. P. Wagner, W. Dultz, M. Kühnelt, Phase matched third harmonic generation in Calomel, Proc. of 26th Int. Conf on the Physics of Semiconductors, ICPS 26, Edinburgh, UK, 2002.
R. Scholz, A. Yu Kobitski, I. Vragovic, T.U. Kampen, D. R. T. Zahn, H. P. Wagner, Microscopic models for time-resolved photoluminescence in a–PTCDA single crystals, Proc. of 26th Int. Conf on the Physics of Semiconductors, ICPS 26, Edinburgh, UK, 2002.
H. P. Wagner, H.-P. Tranitz, A. Pistelok, R. Engelhardt, U. W. Pohl, D. Bimberg, Thermal redistribution and dephasing of localized excitons in CdSe/ZnSSe quantum dot structures, Abstracts at the Alaska Meeting on Fundamental Optical Processes in Semiconductors (AMFOPS), Girdwood, Alaska, 2001, (p.11).
H. P. Wagner, H.-P. Tranitz, M. Reichelt, T. Meier, S. W. Koch, Coherent spectral oscillations in multi-wave mixing, Abstracts at the Alaska Meeting on Fundamental Optical Processes in Semiconductors (AMFOPS), Girdwood, Alaska, 2001, (p.10).
T. S. Shamirzaev, A. I. Toropov, A.K. Bakarov, K.S. Zhuravlev, A. Yu. Kobitzki, H. P. Wagner, D. R. T. Zahn, Bellow-bottleneck polaritonic radiation in ultra-high quality AlGaAs alloys, Proc. of ICPS 25, Osaka, Japan, 2000, Springer Proceedings in Physics 87 (2001), Eds. M. Miura, T. Ando, (p. 91).
H. P. Wagner, H.-P. Tranitz, R. Schuster, G. Bacher, A. Forchel, Biexciton binding and LO-phonon scattering of excitons in ZnSe quantum wires, Proc. of ICPS 25, Osaka, Japan, 2000, Springer Proceedings in Physics 87 (2001), Eds. M. Miura, T. Ando, (p. 1201).
G. Bacher, D. Eisert, T. Kümmell, A. Forchel, M. Kühnelt, H. P. Wagner, G. Landwehr, Implantation induced changes in II-VI semiconductor heterostructures, Proc. of the 5th Int. Conf. on Applications of Accelerators in Research and Industry, 1998, AIP Conference Proceedings, 475, 814 (1999)
H. P. Wagner, W. Langbein, J. M. Hvam, G. Bacher, T. Kümmell, A. Forchel, Interaction and dephasing of excitons in ZnSe quantum wires, Proc. of 24th Int. Conf on the Physics of Semiconductors, ICPS 24, Jerusalem, Israel, 1998, ed. D. Gershoni, CD ROM, file 0793.pdf.
V. Kutzer, H. Born, A. Hoffmann, A. Schätz, H. P. Wagner, Optical properties of trions in ZnSe/ZnMgSe quantum wells, Proc. of 24th Int. Conf on the Physics of Semiconductors, ICPS 24, Jerusalem, Israel, 1998, ed. D. Gershoni, CD ROM, file 0786.pdf.
F.A. Majumder, H. Kalt, C. Klingshirn, H. P. Wagner, W. Gebhardt, Optical Properties of Highly Excited ZnTe Epitaxial Layers, Proc. of the Int. Meeting of the Electrochemical Society, 1995-21, 117 (1995).
C. Trager-Cowan, A. Burley, K. P. O'Donnel, A. Naumov, K. Wolf, H. Stanzl, H. P. Wagner, W. Gebhardt, 3-dimensional Mapping of ZnTe by Cathodoluminescence Spectroscopy, Proc. of the RMSC; Microscopy of Semiconducting Materials 1993, Eds. A.G. Cullis, A.E. Staton-Bevan, J.L. Hutchison, Bristol, UK, IOP 1993, (p. 683).
H. P. Wagner, H. Schmitzer, H. Stanzl, Second harmonic generation in ZnTe waveguides, SPIE Proc. Vol. 1985 - Physical Concepts and Materials for Novel Optoelectronic Device Applications II - Part I (1993), (p. 178).
H. P. Wagner and H. Leiderer, Optical Characterization of ZnTe epilayers, Festkörperprobleme/Advances in Solid State Physics 32, ed. by U. Rössler (Vieweg, Braunschweig/Wiesbaden 1992), (p. 221).
M. A. Foad, A.P. Smart, M. Watt, C. M. Sotomayor Torres, W. Kuhn, H. P. Wagner, H. Leiderer, S. Bauer, C.D.W. Wilkinson, W. Gebhardt and M. Razeghi, Fabrication and assessment of wires and dots in ZnTe and ZnSe, Nanostructures and Mesoscopic Systems (Proc. Int. Symp., Santa Fe, May 19-24, 1991), Eds. W.P. Kirk and M.A. Reed, Academic Press, San Diego (1992) (p. 463).
H. P. Wagner, D. Lichtenberger, K. Wolf, W. Kuhn, W.Gebhardt, Resonant Photoluminescence Measurements of MOVPE Grown ZnTe Layers on (100) GaAs and (100) GaSb, Proc. of the 20th Int. Conf. on the Physics of Semicond. ICPS, Thessaloniki, 1990, eds. E. M. Anastassakis, J. D. Joannopoulos, Volume 1, (p 304).
H. P. Wagner, W. Prettl, Identification of metastable shallow donor states of n-GaAs in a magnetic field, Proc. of the 14th Intern. Conf. on Infrared and Millimeter Waves, Würzburg, 1989.