Reflection-less width-modulated magnonic crystal

• Type: Article in International Scientific Journal
• Date: 2020

Authors

Frey, P (Author) Other; Nikitin, AA (Author) Other; Bozhko, DA (Author) Other; Bunyaev, SA (Author) FCUP; G.N. Kakazei (Author) FCUP; Ustinov, AB (Author) Other; Kalinikos, BA (Author) Other; Ciubotaru, F (Author) Other; Chumak, AV (Author) Other; Wang, Q (Author) Other; Tiberkevich, VS (Author) Other; Hillebrands, B (Author) Other; Serga, AA (Author) Other

Journal

Title: Communications Physics

Vol. 3

ISSN: 2399-3650

Publisher: Springer Nature

Indexing

ISI Web of Knowledge - 30 Citations

Scopus - 31 Citations

Other information

Authenticus ID: P-00R-N80

DOI: 10.1038/s42005-020-0281-y

Abstract (EN): By modulating the dimensions of magnonic crystals, their transmission properties in the microwave regime may be tuned and so applications including information processing are anticipated. The authors here show reflection-less spin-wave propagation may be realised in a width-modulated waveguide. The interest in artificial magnetic media such as magnonic crystals increased substantially in recent years due to their potential applications in information processing at microwave frequencies. The main features of these crystals are the presence of band gaps in the spin-wave spectra, usually formed due to Bragg reflections of spin-waves on the artificially created periodic structures. Here, we study spin-wave propagation in longitudinally magnetized width- and thickness-modulated yttrium iron garnet waveguides by means of Brillouin light scattering and microwave spectroscopy techniques. It is found that the width modulated crystal does not manifest noticeable Bragg reflections, but still demonstrates a pronounced band gap in its transmission characteristic. The phenomenon can be explained by the destructive interference between different frequency-degenerated spin-wave modes excited by the crystal. Such a reflection-less crystal is promising for future design of multi-element magnonic devices.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7