Uwe Happek
PROFESSOR OF PHYSICS
| Office: | 236/329 Physics Building |
| Phone: | 706-542-2859/3427 |
| E-mail: | uhappek@physast.uga.edu |
| Group web page: | http://www.physast.uga.edu/happekgroup |
| Biographical Information: | Dr. rer. nat.
(Physics), Universität
Regensburg, Germany, 1989 Diploma in Physics, Universität Regensburg, Germany, 1982 |
| Honors and Awards: | Erskine Fellow,
University of Canterbury, Christchurch,
NZ, 1997 Feodor Lynen Fellow of the Alexander von Humboldt Foundation, 1989 |
Research Interests
Our research is focused on experimental studies of dynamical processes in condensed matter. Current interests include charge transport in ferroelectric and photorefractive solids, energy transfer in luminescent materials, relaxation of molecular impurities, spectroscopy of semiconductors, and time-resolved x-ray scattering.
Collaborations exist with universities, National Laboratories and industry within the US and with research groups in The Netherlands, Germany, Russia, and New Zealand.
Recent Publications
S. M. Loureiro, A. Setlur, W. Heward, S. Taylor, H. Comanzo, M. Monoharan, A. Srivastava, P. Schmidt, and U. Happek; First observation of quantum splitting behavior in nanocrystalline SrAl12O19:Pr, Mg phosphor. Chemistry of Materials 17(2005) 3108.
J.K. Krebs and U. Happek; Optical Spectroscopy of Trivalent Chromium in Sol-Gel Lithium Niobate. Applied Physics Letters 87, (2005) 251910.
V. Venkatasamy, N. Jayajaru, S.M. Cox, U. Happek, J.L. Stickney; Optimization of CdTe nanofilm formation by electrochemical atomic layer epitaxy (EC-ALE). Journal of Applied Electrochemistry 36 (11) (2006) 1223.
D. Mihalcea, C.L. Bohn, U. Happek, and P. Piot; Lomgitudinal electron bunch diagnostic using coherent transition radiation. Phys. Rev., Accelerators and Beams 9 (8) (2006) 082801.
J. Grimm, J. Fleniken, K.W. Krämer, D.Biner, U. Happek, and H.U. Güdel; On the determination of photoionization thresholds of Ce3+ doped Cs3LuCl6, Cs2LiLuCl6 and Cs2LiYCl6 by thermoluminescence. Journal of Luminescence (2006).
U.Happek and G.M. Salley; Photoionization Energies of Cr3+ in LiNbO3. Journal of Luminescence 125 (2006) 104.
A.M. Srivastava, A.A. Setlur, H.A. Comanzo, Y. Gao, M.E. Hannah, J.A. Hughes, and U. Happek; Optical spectroscopy and thermal quenching of the Ce3+ luminescence in yttrium oxysulafate, Y2O2[SO4]. Optical Materials, (2007).
A.M. Srivastava, S.J. Duclos, H.A. Comanzo, S.M. Loureiro, J.S. Vartuli, P.A. Schmidt. And U. Happek; Luminescence of LuCl3 doped with Pr3+. IEEE Transactions on Nuclear Science, in press (2008).
A.A. Setlur, A.M. Srivastava, H.L. Pham, M.E. Hannah, and U. Happek; Charge creation, trapping and long phosphorescence in Sr2MgSi2O7:Eu2+, RE3+. Journal of Applied Physics 103 (2008) 053153.
A.M. Srivastava, U. Happek, and P. Schmidt, Luminescence of LuCl3:Pr3+ under interconfigurational (4f2 ® 4f15d1) and band gap excitation . Optical Materials, in press (2008).
A.A, Setlur, J.J. Shiang, and U. Happek; Eu2+ - Mn2+ phosphor saturation in 5 mm light emitting diode lamps. Applied Physics Letters 92 (2008) 081104.
