@article{4409, abstract = {{We investigate the interplay between geometrical lattice resonances and surface plasmons mediating the emission of Smith-Purcell visible light via angle-resolved cathodoluminescence spectroscopy. We observe strong modulations in the dispersion curves of Smith-Purcell radiation (SPR) when they intersect the surface plasmons of silver gratings using a 200-kV transmission electron microscope. The decay of the plasmons away from the grating is directly probed by controlling the electron-beam position relative to the sample surface with nanometer precision. Our measurements are in excellent agreement with numerical simulations, clearly revealing the presence of characteristic Fano profiles resulting from the interference of the light continuum and the discrete plasmon states for each direction of emission. The intensity anomaly in the SPR emission pattern can be well explained from the geometrical consideration of the intersections between the dispersion planes of the SPR and surface plasmon polariton (SPP). A strong and directional SPR beam can be realized under the condition that the SPR dispersion plane comes in contact with the band edge of the SPP dispersion plane.}}, author = {{Yamamoto, Naoki and Javier García de Abajo, F. and Myroshnychenko, Viktor}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, number = {{12}}, publisher = {{American Physical Society (APS)}}, title = {{{Interference of surface plasmons and Smith-Purcell emission probed by angle-resolved cathodoluminescence spectroscopy}}}, doi = {{10.1103/physrevb.91.125144}}, volume = {{91}}, year = {{2015}}, } @article{7218, author = {{Debus, J. and Kudlacik, D. and Sapega, V. F. and Dunker, D. and Bohn, P. and Paßmann, F. and Braukmann, D. and Rautert, J. and Yakovlev, D. R. and Reuter, Dirk and Wieck, A. D. and Bayer, M.}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, number = {{19}}, publisher = {{American Physical Society (APS)}}, title = {{{Nuclear spin polarization in the electron spin-flip Raman scattering of singly charged (In,Ga)As/GaAs quantum dots}}}, doi = {{10.1103/physrevb.92.195421}}, volume = {{92}}, year = {{2015}}, } @article{7222, author = {{Finke, A. and Ruth, M. and Scholz, S. and Ludwig, A. and Wieck, A. D. and Reuter, Dirk and Pawlis, A.}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, number = {{3}}, publisher = {{American Physical Society (APS)}}, title = {{{Extending the spectral range of CdSe/ZnSe quantum wells by strain engineering}}}, doi = {{10.1103/physrevb.91.035409}}, volume = {{91}}, year = {{2015}}, } @article{6522, abstract = {{An electric field applied to a semiconductor reduces its crystal symmetry and modifies its electronic structure which is expected to result in changes of the linear and nonlinear response to optical excitation. In GaAs, we observe experimentally strong electric field effects on the optical second (SHG) and third (THG) harmonic generation. The SHG signal for the laser-light k vector parallel to the [001] crystal axis is symmetry forbidden in the electric-dipole approximation, but can be induced by an applied electric field in the vicinity of the 1s exciton energy. Surprisingly, the THG signal, which is allowed in this geometry, is considerably reduced by the electric field. We develop a theory which provides good agreement with the experimental data. In particular, it shows that the optical nonlinearities for the 1s exciton resonance are modified in an electric field by the Stark effect, which mixes the 1s and 2p exciton states of opposite parity. This mixing acts in opposite way on the SHG and THG processes, as it leads to the appearance of forbidden SHG in (001)-oriented GaAs and decreases the crystallographic THG.}}, author = {{Brunne, D. and Lafrentz, M. and Pavlov, V. V. and Pisarev, R. V. and Rodina, A. V. and Yakovlev, D. R. and Bayer, M.}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, number = {{8}}, publisher = {{American Physical Society (APS)}}, title = {{{Electric field effect on optical harmonic generation at the exciton resonances in GaAs}}}, doi = {{10.1103/physrevb.92.085202}}, volume = {{92}}, year = {{2015}}, } @article{15859, author = {{Schmutzler, Johannes and Lewandowski, Przemyslaw and Aßmann, Marc and Niemietz, Dominik and Schumacher, Stefan and Kamp, Martin and Schneider, Christian and Höfling, Sven and Bayer, Manfred}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, title = {{{All-optical flow control of a polariton condensate using nonresonant excitation}}}, doi = {{10.1103/physrevb.91.195308}}, year = {{2015}}, } @article{10027, author = {{Landmann, M. and Rauls, E. and Schmidt, Wolf Gero and Neumann, M. D. and Speiser, E. and Esser, N.}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, title = {{{GaNm-plane: Atomic structure, surface bands, and optical response}}}, doi = {{10.1103/physrevb.91.035302}}, year = {{2015}}, } @article{10031, author = {{Li, Yanlu and Schmidt, Wolf Gero and Sanna, Simone}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, title = {{{Defect complexes in congruentLiNbO3and their optical signatures}}}, doi = {{10.1103/physrevb.91.174106}}, year = {{2015}}, } @article{13493, author = {{Müllegger, Stefan and Rauls, Eva and Gerstmann, Uwe and Tebi, Stefano and Serrano, Giulia and Wiespointner-Baumgarthuber, Stefan and Schmidt, Wolf Gero and Koch, Reinhold}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, number = {{22}}, title = {{{Mechanism for nuclear and electron spin excitation by radio frequency current}}}, doi = {{10.1103/physrevb.92.220418}}, volume = {{92}}, year = {{2015}}, } @article{13496, author = {{Edler, F. and Miccoli, I. and Demuth, S. and Pfnür, H. and Wippermann, S. and Lücke, A. and Schmidt, Wolf Gero and Tegenkamp, C.}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, number = {{8}}, title = {{{Interwire coupling forIn(4×1)/Si(111) probed by surface transport}}}, doi = {{10.1103/physrevb.92.085426}}, volume = {{92}}, year = {{2015}}, } @article{13502, author = {{Klein, C. and Vollmers, N. J. and Gerstmann, Uwe and Zahl, P. and Lükermann, D. and Jnawali, G. and Pfnür, H. and Tegenkamp, C. and Sutter, P. and Schmidt, Wolf Gero and Horn-von Hoegen, M.}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, number = {{19}}, title = {{{Barrier-free subsurface incorporation of 3d metal atoms into Bi(111) films}}}, doi = {{10.1103/physrevb.91.195441}}, volume = {{91}}, year = {{2015}}, } @article{13506, author = {{Sanson, A. and Zaltron, A. and Argiolas, N. and Sada, C. and Bazzan, M. and Schmidt, Wolf Gero and Sanna, S.}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, title = {{{Polaronic deformation at theFe2+/3+impurity site inFe:LiNbO3crystals}}}, doi = {{10.1103/physrevb.91.094109}}, volume = {{91}}, year = {{2015}}, } @article{13507, author = {{Landmann, M. and Rauls, E. and Schmidt, Wolf Gero and Neumann, M. D. and Speiser, E. and Esser, N.}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, title = {{{GaNm-plane: Atomic structure, surface bands, and optical response}}}, doi = {{10.1103/physrevb.91.035302}}, volume = {{91}}, year = {{2015}}, } @article{31943, author = {{Ma, Xuekai and Chestnov, I. Yu. and Charukhchyan, M. V. and Alodjants, A. P. and Egorov, O. A.}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, keywords = {{Condensed Matter Physics, Electronic, Optical and Magnetic Materials}}, number = {{21}}, publisher = {{American Physical Society (APS)}}, title = {{{Oscillatory dynamics of nonequilibrium dissipative exciton-polariton condensates in weak-contrast lattices}}}, doi = {{10.1103/physrevb.91.214301}}, volume = {{91}}, year = {{2015}}, } @article{31944, author = {{Liew, T. C. H. and Egorov, O. A. and Matuszewski, M. and Kyriienko, O. and Ma, Xuekai and Ostrovskaya, E. A.}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, keywords = {{Condensed Matter Physics, Electronic, Optical and Magnetic Materials}}, number = {{8}}, publisher = {{American Physical Society (APS)}}, title = {{{Instability-induced formation and nonequilibrium dynamics of phase defects in polariton condensates}}}, doi = {{10.1103/physrevb.91.085413}}, volume = {{91}}, year = {{2015}}, } @article{4332, abstract = {{LiTaO3 and LiNbO3 crystals are investigated here in a combined experimental and theoretical study that uses Raman spectroscopy in a complete set of scattering geometries and corresponding density-functional theory calculations to provide microscopic information on their vibrational properties. The Raman scattering efficiency is computed from first principles in order to univocally assign the measured Raman peaks to the calculated eigenvectors. Measured and calculated Raman spectra are shown to be in qualitative agreement and confirm the mode assignment by Margueron et al. [J. Appl. Phys. 111, 104105 (2012)], thus finally settling a long debate. While the two crystals show rather similar vibrational properties overall, the E-TO9 mode is markedly different in the two oxides. The deviations are explained by a different anion-cation bond type in LiTaO3 and LiNbO3 crystals.}}, author = {{Sanna, Simone and Neufeld, Sergej and Rüsing, Michael and Berth, Gerhard and Zrenner, Artur and Schmidt, Wolf Gero}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, number = {{22}}, publisher = {{American Physical Society (APS)}}, title = {{{Raman scattering efficiency in LiTaO3 and LiNbO3 crystals}}}, doi = {{10.1103/physrevb.91.224302}}, volume = {{91}}, year = {{2015}}, } @article{7225, author = {{Schüler, B. and Cerchez, M. and Xu, Hengyi and Schluck, J. and Heinzel, T. and Reuter, Dirk and Wieck, A. D.}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, number = {{20}}, publisher = {{American Physical Society (APS)}}, title = {{{Observation of quantum states without a semiclassical equivalence bound by a magnetic field gradient}}}, doi = {{10.1103/physrevb.90.201111}}, volume = {{90}}, year = {{2014}}, } @article{7226, author = {{Debus, J. and Sapega, V. F. and Dunker, D. and Yakovlev, D. R. and Reuter, Dirk and Wieck, A. D. and Bayer, M.}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, number = {{23}}, publisher = {{American Physical Society (APS)}}, title = {{{Spin-flip Raman scattering of the resident electron in singly charged (In,Ga)As/GaAs quantum dot ensembles}}}, doi = {{10.1103/physrevb.90.235404}}, volume = {{90}}, year = {{2014}}, } @article{7227, author = {{Varwig, S. and Evers, E. and Greilich, A. and Yakovlev, D. R. and Reuter, Dirk and Wieck, A. D. and Bayer, M.}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, number = {{12}}, publisher = {{American Physical Society (APS)}}, title = {{{All-optical implementation of a dynamic decoupling protocol for hole spins in (In,Ga)As quantum dots}}}, doi = {{10.1103/physrevb.90.121306}}, volume = {{90}}, year = {{2014}}, } @article{7228, author = {{Varwig, S. and Yugova, I. A. and René, A. and Kazimierczuk, T. and Greilich, A. and Yakovlev, D. R. and Reuter, Dirk and Wieck, A. D. and Bayer, M.}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, number = {{12}}, publisher = {{American Physical Society (APS)}}, title = {{{Excitation of complex spin dynamics patterns in a quantum-dot electron spin ensemble}}}, doi = {{10.1103/physrevb.90.121301}}, volume = {{90}}, year = {{2014}}, } @article{7233, author = {{Carrad, D. J. and Burke, A. M. and Klochan, O. and See, A. M. and Hamilton, A. R. and Rai, A. and Reuter, Dirk and Wieck, A. D. and Micolich, A. P.}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, number = {{15}}, publisher = {{American Physical Society (APS)}}, title = {{{Determining the stability and activation energy of Si acceptors in AlGaAs using quantum interference in an open hole quantum dot}}}, doi = {{10.1103/physrevb.89.155313}}, volume = {{89}}, year = {{2014}}, }