Regensburg 2019 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 37: Focus Session: Insulator Spintronics

MA 37.2: Hauptvortrag

Mittwoch, 3. April 2019, 16:15–16:45, H38

Implementation of the Stimulated-Raman-Adiabatic-Passage mechanism in magnonics — •Burkard Hillebrands — Fachbereich Physik and Landesforschungszentrum OPTIMAS, Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany

Magnonics is the field of spin waves. Being wave-based, magnonics bears the advantage of the ease of implementation of computation schemes developed in other areas of wave-based phenomena. One example is the concept of "quantum- classical analogy", which was created in the field of waveguide optics. It was shown, that the use of classical light in optical waveguides allows for the physical realization of quantum phenomena in atom physics, such as the population transfer between two states via a third, intermediate, dark state, where direct transitions between the two states are dipole forbidden. This process is referred to as STImulated Raman Adiabatic Passage (STIRAP) and has found various applications in many fields of physics.

We present first results of the magnonic realization of such a STIRAP process (m-STIRAP). Using micromagnetic simulations, we show that the population of magnons can be transferred between two waveguides via an intermediate waveguide. If the "counterintuitive" coupling scheme is used, the intermediate waveguide is not excited during the transfer, thus resembling the quantum-classical analogy of a dark state.

Our results bear high potential for future magnonic device functionalities and designs by bringing together the wealth of quantum-classical analogy phenomena with the wealth of means to control wave propagation in magnonic systems.