Dresden 2020 – scientific programme

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MA: Fachverband Magnetismus

MA 42: Posters Magnetism I

MA 42.4: Poster

Wednesday, March 18, 2020, 15:00–18:00, P3

Implementation of the Stimulated-Raman-Adiabatic-Passage mechanism in magnonics — Qi Wang, •Anna M. Friedel, Thomas Brächer, Andrii V. Chumak, Burkard Hillebrands, and Philipp Pirro — Fachbereich Physik and Landesforschungszentrum OPTIMAS, TU Kaiserslautern, Kaiserslautern, Germany

The Stimulated Raman Adiabatic Passage (STIRAP) is a process known from atomic physics which describes the population transfer between two states, where direct transitions are dipole forbidden, using a specific coupling scheme to a third state. The STIRAP process has found various applications in many fields of physics [1] and has already been implemented in the field of waveguide optics [2]. We present first results of the magnonic realisation of the STIRAP process. Our demonstrator consists of three, partially curved magnonic waveguides, which are locally coupled via the dipolar stray fields of magnons in well-defined regions of small separation between two neighbouring waveguides. Using micromagnetic simulations, we show that the population of magnons can be transferred between the outer waveguides via the intermediate waveguide. Analogous to the atomic STIRAP process, if the "counterintuitive" coupling scheme is used, the intermediate waveguide is not excited during the transfer. This implementation of a mechanism known from the field of quantum control and coherent control into magnonic functionalities is one of many quantum-classical analogy phenomena that could be transferred to magnonics.

[1] K. Bergmann et al., J. Phys. B 52, 202001 (2019)

[2] S. Longhi, Laser Photonics Rev. 3, 243 (2009)