Print Email Facebook Twitter All-optical observation and reconstruction of spin wave dispersion Title All-optical observation and reconstruction of spin wave dispersion Author Hashimoto, Yusuke (Tohoku University) Daimon, Shunsuke (Tohoku University) Iguchi, Ryo (Tohoku University) Oikawa, Yasuyuki (Tohoku University) Shen, K. (TU Delft QN/Bauer Group) Sato, Koji (Tohoku University) Bossini, Davide (University of Tokyo) Tabuchi, Yutaka (University of Tokyo) Satoh, Takuya (Kyushu University) Hillebrands, Burkard (Technische Universität Kaiserslautern) Bauer, G.E. (TU Delft QN/Bauer Group; Tohoku University) Johansen, Tom H. (Universitetet i Oslo; University of Wollongong) Kirilyuk, Andrei (Radboud Universiteit Nijmegen) Rasing, Theo (Radboud Universiteit Nijmegen) Saitoh, Eiji (Tohoku University; Japan Atomic Energy Agency) Date 2017-06-12 Abstract To know the properties of a particle or a wave, one should measure how its energy changes with its momentum. The relation between them is called the dispersion relation, which encodes essential information of the kinetics. In a magnet, the wave motion of atomic spins serves as an elementary excitation, called a spin wave, and behaves like a fictitious particle. Although the dispersion relation of spin waves governs many of the magnetic properties, observation of their entire dispersion is one of the challenges today. Spin waves whose dispersion is dominated by magnetostatic interaction are called pure-magnetostatic waves, which are still missing despite of their practical importance. Here, we report observation of the band dispersion relation of pure-magnetostatic waves by developing a table-top all-optical spectroscopy named spin-wave tomography. The result unmasks characteristics of pure-magnetostatic waves. We also demonstrate time-resolved measurements, which reveal coherent energy transfer between spin waves and lattice vibrations. To reference this document use: http://resolver.tudelft.nl/uuid:6fc5d3fd-54da-453b-b238-0d901d7aa1ac DOI https://doi.org/10.1038/ncomms15859 ISSN 2041-1723 Source Nature Communications, 8 Part of collection Institutional Repository Document type journal article Rights © 2017 Yusuke Hashimoto, Shunsuke Daimon, Ryo Iguchi, Yasuyuki Oikawa, K. Shen, Koji Sato, Davide Bossini, Yutaka Tabuchi, Takuya Satoh, Burkard Hillebrands, G.E. Bauer, Tom H. Johansen, Andrei Kirilyuk, Theo Rasing, Eiji Saitoh Files PDF ncomms15859.pdf 1.06 MB Close viewer /islandora/object/uuid:6fc5d3fd-54da-453b-b238-0d901d7aa1ac/datastream/OBJ/view