TRR 160: Coherent Manipulation of Interacting Spin Excitations in Tailored Semiconductors (Coordination: TU Do)

Type of Funding: DFG Programmes, Collaborative Research Centres

The strong interest in spin excitations in semiconductors is based on the expectation that a control of their magnetic properties in addition to their electrical and optical features could enable all-in-one-chip solutions in information processing. Decisive progress in that respect may be achieved if the coherence of spin excitations could be exploited in manipulation not only of an individual spin, but also of deliberately interacting spins, potentially giving access to a wealth of novel functionalities such as coherent spin-switching. The current ICRC “Coherent manipulation of interacting spin excitations in tailored semiconductors” between the Ioffe Physical-Technical Institute and the State University in St. Petersburg as well as the TU Dortmund comprises the whole spectrum of necessary activities in material technology, coherent spectroscopy and advanced modeling. The overarching goal of the ICRC requires elaboration of prospective material concepts and sophisticated manipulation tools, inspired by recent progress in obtaining material of highest purity, by advancing spectroscopic techniques to reach ultimate sensitivity and by developing elaborate models for spins interacting within a many-body environment. Vice versa, the magnetic hardware developed may also allow for advanced light manipulation using enhanced magneto-optical effects. The material basis is predominantly provided by III-V or II-VI semiconductor quantum structures also combined with metals to form hybrid systems, hosting either localized or motile spins with robust properties that allow for versatile manipulation involving laser light and microwave radiation or utilizing novel tools such as ultrafast acoustics. The interactions between the spins will be tailored, either to suppress detrimental environmental interactions and maintain spin coherence or to corroborate interactions between spins. Thus, superposition and entanglement of quantum states could be established in order to achieve functionalities that cannot be realized in the incoherent regime. In that way, the ICRC could contribute to the future development of spin-optoelectronics for information technologies in the classical and the quantum regime.

Project Website

Contact Person at UA Ruhr:
Prof. Dr. Manfred Bayer, TU Dortmund University

UA Ruhr Researchers:
Prof. Dr. Frithjof Anders, TU Dortmund University
Jun.-Prof. Dr. Marc-Alexander Aßmann, TU Dortmund University
Prof. Dr. Markus Betz, TU Dortmund University
Dr. Jörg Debus, TU Dortmund University
Dr. Alex Greilich, TU Dortmund University
Dr. Arne Ludwig, Ruhr-Universität Bochum
Prof. Dr. Andreas Wieck, Ruhr-Universität Bochum

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