@article{43747, abstract = {{Vortices are topological objects representing the circular motion of a fluid. With their additional degree of freedom, the vorticity, they have been widely investigated in many physical systems and different materials for fundamental interest and for applications in data storage and information processing. Vortices have also been observed in non-equilibrium exciton-polariton condensates in planar semiconductor microcavities. There they appear spontaneously or can be created and pinned in space using ring-shaped optical excitation profiles. However, using the vortex state for information processing not only requires creation of a vortex but also efficient control over the vortex after its creation. Here we demonstrate a simple approach to control and switch a localized polariton vortex between opposite states. In our scheme, both the optical control of vorticity and its detection through the orbital angular momentum of the emitted light are implemented in a robust and practical manner.}}, author = {{Meier, Torsten and Ma, Xuekai and Berger, Bernd and Aßmann, Marc and Driben, Rodislav and Schneider, Christian and Höfling, Sven and Schumacher, Stefan}}, journal = {{Nature communications}}, number = {{1}}, pages = {{897}}, publisher = {{Nature Publishing Group UK}}, title = {{{Realization of all-optical vortex switching in exciton-polariton condensates}}}, doi = {{10.1038/s41467-020-14702-5}}, volume = {{11}}, year = {{2020}}, } @inproceedings{20770, author = {{Hannes, Wolf-Rüdiger and Meier, Torsten}}, booktitle = {{Ultrafast Phenomena and Nanophotonics XXIV}}, editor = {{Betz, Markus and Elezzabi, Abdulhakem Y.}}, isbn = {{9781510633193}}, pages = {{112780S}}, title = {{{k.p-based multiband simulations of non-degenerate two-photon absorption in bulk GaAs}}}, doi = {{10.1117/12.2545924}}, volume = {{11278}}, year = {{2020}}, } @article{20563, author = {{Hannes, W.-R. and Trautmann, Alexander and Stein, M. and Schäfer, F. and Koch, M. and Meier, Torsten}}, journal = {{Physical Review B}}, number = {{7}}, pages = {{075203}}, publisher = {{American Physical Society}}, title = {{{Strongly nonresonant four-wave mixing in semiconductors}}}, doi = {{10.1103/PhysRevB.101.075203}}, volume = {{101}}, year = {{2020}}, } @article{20772, author = {{Song, Xiaohong and Yang, Shidong and Zuo, Ruixin and Meier, Torsten and Yang, Weifeng}}, issn = {{2469-9926}}, journal = {{Physical Review A}}, title = {{{Enhanced high-order harmonic generation in semiconductors by excitation with multicolor pulses}}}, doi = {{10.1103/physreva.101.033410}}, volume = {{101}}, year = {{2020}}, } @article{20580, author = {{Ma, Xuekai and Berger, B and Aßmann, M and Driben, R and Meier, Torsten and Schneider, C and Höfling, S and Schumacher, Stefan}}, issn = {{2041-1723}}, journal = {{Nature Communications}}, number = {{1}}, pages = {{897}}, title = {{{Realization of all-optical vortex switching in exciton-polariton condensates}}}, doi = {{10.1038/s41467-020-14702-5}}, volume = {{11}}, year = {{2020}}, } @article{14544, author = {{Vondran, J. and Spitzer, F. and Bayer, M. and Akimov, I. A. and Trautmann, Alexander and Reichelt, Matthias and Meier, Cedrik and Weber, N. and Meier, Torsten and André, R. and Mariette, H.}}, issn = {{2469-9950}}, journal = {{Physical Review B}}, number = {{15}}, pages = {{155308}}, title = {{{Spatially asymmetric transients of propagating exciton-polariton modes in a planar CdZnTe/CdMgTe guiding structure}}}, doi = {{10.1103/physrevb.100.155308}}, volume = {{100}}, year = {{2019}}, } @article{37288, abstract = {{An integrated chip with quantum state generation, active polarization manipulation, and precise time control is demonstrated.}}, author = {{Luo, Kai-Hong and Brauner, Sebastian and Eigner, Christof and Sharapova, Polina and Ricken, Raimund and Meier, Torsten and Herrmann, Harald and Silberhorn, Christine}}, issn = {{2375-2548}}, journal = {{Science Advances}}, keywords = {{Multidisciplinary}}, number = {{1}}, publisher = {{American Association for the Advancement of Science (AAAS)}}, title = {{{Nonlinear integrated quantum electro-optic circuits}}}, doi = {{10.1126/sciadv.aat1451}}, volume = {{5}}, year = {{2019}}, } @inproceedings{13285, author = {{Hannes, Wolf-Rüdiger and Krauß-Kodytek, Laura and Ruppert, Claudia and Betz, Markus and Meier, Torsten}}, booktitle = {{Ultrafast Phenomena and Nanophotonics XXIII}}, editor = {{Betz, Markus and Elezzabi, Abdulhakem Y.}}, isbn = {{9781510624740}}, title = {{{Intensity-dependent degenerate and non-degenerate nonlinear optical absorption of direct-gap semiconductors}}}, doi = {{10.1117/12.2503539}}, volume = {{10916}}, year = {{2019}}, } @article{13284, author = {{Hannes, Wolf-Rüdiger and Meier, Torsten}}, issn = {{2469-9950}}, journal = {{Physical Review B}}, number = {{12}}, title = {{{Higher-order contributions and nonperturbative effects in the nondegenerate nonlinear optical absorption of semiconductors using a two-band model}}}, doi = {{10.1103/physrevb.99.125301}}, volume = {{99}}, year = {{2019}}, } @inproceedings{43748, abstract = {{The fundamental interband absorption in gallium arsenide shows a strong blue shift when biased by mid-infrared transients exceeding 10 MV/cm. This subcycle feature is induced by the localization of electronic wavefunctions from 3D to 2D.}}, author = {{Meier, Torsten and Bühler, Johannes and Schmidt, Christian and Heinrich, Alexander-Cornelius and Allerbeck, Jonas and Podzimski, Reinold and Berghoff, Daniel and Schmidt, Wolf Gero and Reichl, Christian and Wegscheider, Werner and Brida, Daniele and Leitenstorfer, Alfred}}, booktitle = {{XXI International Conference on Ultrafast Phenomena 2018 (UP 2018)}}, publisher = {{EDP Sciences}}, title = {{{Subcycle Wannier-Stark Localization by Mid-Infrared Bias in Gallium Arsenide}}}, doi = {{10.1051/epjconf/201920505001}}, volume = {{205}}, year = {{2019}}, } @article{22887, author = {{Vondran, J. and Spitzer, F. and Bayer, M. and Akimov, I. A. and Trautmann, Alexander and Reichelt, Matthias and Meier, Cedrik and Weber, N. and Meier, Torsten and André, R. and Mariette, H.}}, issn = {{2469-9950}}, journal = {{Physical Review B}}, number = {{15}}, pages = {{155308}}, title = {{{Spatially asymmetric transients of propagating exciton-polariton modes in a planar CdZnTe/CdMgTe guiding structure}}}, doi = {{10.1103/physrevb.100.155308}}, volume = {{100}}, year = {{2019}}, } @unpublished{22884, abstract = {{Measurement-induced nonclassical effects in a two-mode interferometer are investigated theoretically using numerical simulations and analytical results. We demonstrate that for certain parameters measurements within the interferometer lead to the occurrence of two-mode squeezing. The results strongly depend on the detection probability, the phase inside the interferometer, and the choice of the input states. The appropriate parameters for maximized squeezing are obtained. We analyze the influence of losses and confirm that the predicted effects are within reach of current experimental techniques.}}, author = {{Riabinin, Matvei and Sharapova, Polina and Bartley, Tim and Meier, Torsten}}, booktitle = {{arXiv:1912.09097}}, title = {{{Generating two-mode squeezing with multimode measurement-induced nonlinearity}}}, year = {{2019}}, } @article{13900, author = {{Song, Xiaohong and Zuo, Ruixin and Yang, Shidong and Li, Pengcheng and Meier, Torsten and Yang, Weifeng}}, issn = {{1094-4087}}, journal = {{Optics Express}}, number = {{3}}, pages = {{2225--2234}}, title = {{{Attosecond temporal confinement of interband excitation by intraband motion}}}, doi = {{10.1364/oe.27.002225}}, volume = {{27}}, year = {{2019}}, } @article{13283, author = {{Duc, Huynh Thanh and Ngo, Cong and Meier, Torsten}}, issn = {{2469-9950}}, journal = {{Physical Review B}}, number = {{4}}, title = {{{Ballistic photocurrents in semiconductor quantum wells caused by the excitation of asymmetric excitons}}}, doi = {{10.1103/physrevb.100.045308}}, volume = {{100}}, year = {{2019}}, } @article{20578, author = {{Driben, R and Ma, Xuekai and Schumacher, Stefan and Meier, Torsten}}, issn = {{0146-9592}}, journal = {{Optics Letters}}, number = {{6}}, pages = {{1327--1330}}, title = {{{Bloch oscillations of multidimensional dark soliton wave packets and light bullets}}}, doi = {{10.1364/ol.44.001327}}, volume = {{44}}, year = {{2019}}, } @inproceedings{40388, author = {{Luo, Kai Hong and Brauner, Sebastian and Eigner, Christof and Sharapova, Polina and Ricken, Raimund and Meier, Torsten and Herrmann, Harald and Silberhorn, Christine}}, booktitle = {{Conference on Lasers and Electro-Optics}}, isbn = {{978-1-943580-42-2}}, location = {{San Jose, California United States}}, publisher = {{OSA}}, title = {{{Monolithically Integrated Hong-Ou-Mandel Experiment in LiNbO3}}}, doi = {{10.1364/cleo_qels.2018.fm1g.3}}, year = {{2018}}, } @inbook{43193, abstract = {{Short laser pulses are able to generate material excitations with a well-defined phase which is imposed by the optical excitation source. The generated coherent superposition state be described as an optical polarization which exists only in non-equilibrium situations. The coherence, i.e., the phase relations between the optical transitions that originate from the excitation, leads to several interesting effects in time-resolved linear and nonlinear optical spectroscopy. In this article, the basic principles that underlie these coherent transients are introduced and several examples are presented.}}, author = {{Meier, Torsten and Koch, S.W.}}, booktitle = {{Encyclopedia of Modern Optics (Second Edition)}}, editor = {{Guenther, Bob and Steel, Duncan}}, pages = {{264--277}}, publisher = {{Elsevier}}, title = {{{Foundations of Coherent Transients in Semiconductors}}}, doi = {{10.1016/B978-0-12-803581-8.09564-3}}, volume = {{4}}, year = {{2018}}, } @article{4370, author = {{Schmidt, C. and Bühler, J. and Heinrich, A.-C. and Allerbeck, J. and Podzimski, R. and Berghoff, D. and Meier, Torsten and Schmidt, Wolf Gero and Reichl, C. and Wegscheider, W. and Brida, D. and Leitenstorfer, A.}}, issn = {{2041-1723}}, journal = {{Nature Communications}}, number = {{1}}, publisher = {{Springer Nature}}, title = {{{Signatures of transient Wannier-Stark localization in bulk gallium arsenide}}}, doi = {{10.1038/s41467-018-05229-x}}, volume = {{9}}, year = {{2018}}, } @article{10018, author = {{Schmidt, Claudia and Bühler, J. and Heinrich, A.-C. and Allerbeck, J. and Podzimski, R. and Berghoff, Daniel and Meier, Torsten and Schmidt, Wolf Gero and Reichl, C. and Wegscheider, W. and Brida, D. and Leitenstorfer, A.}}, issn = {{2041-1723}}, journal = {{Nature Communications}}, title = {{{Signatures of transient Wannier-Stark localization in bulk gallium arsenide}}}, doi = {{10.1038/s41467-018-05229-x}}, volume = {{9}}, year = {{2018}}, } @article{4369, author = {{Geiger, Zachary A. and Fujiwara, Kurt M. and Singh, Kevin and Senaratne, Ruwan and Rajagopal, Shankari V. and Lipatov, Mikhail and Shimasaki, Toshihiko and Driben, Rodislav and Konotop, Vladimir V. and Meier, Torsten and Weld, David M.}}, issn = {{0031-9007}}, journal = {{Physical Review Letters}}, number = {{21}}, publisher = {{American Physical Society (APS)}}, title = {{{Observation and Uses of Position-Space Bloch Oscillations in an Ultracold Gas}}}, doi = {{10.1103/physrevlett.120.213201}}, volume = {{120}}, year = {{2018}}, }