Broadband and total autocollimation of spin waves using planar magnonic crystals

Journal Article · Tue Apr 14 00:00:00 EDT 2015 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4917053· OSTI ID:22402838

Kumar, D.; Adeyeye, A. O. ^[1]

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1. Information Storage Materials Laboratory, Department of Electrical and Computer Engineering, National University of Singapore, Singapore 117576 (Singapore)

We present a systematic study of spin wave autocollimation in planar magnonic crystals comprising of antidot arrays in nanoscale permalloy (Py: Ni{sub 80}Fe{sub 20}) thin films. It is shown that a careful design of such crystals can allow for the autocollimation of the entire spin wave spectrum without any significant evanescence or any drop in the group velocity. These developments allow us access to spin wave beams which do not disperse or converge outside a waveguide. Collimated spin wave beams would be essential in applications such as dense signal routing and multiplexing in higher dimensional magnonic systems.

• OSTI ID: 22402838
• Journal Information: Journal of Applied Physics, Vol. 117, Issue 14; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CRYSTALS
ENERGY SPECTRA
MAGNONS
NANOSTRUCTURES
NICKEL BASE ALLOYS
PERMALLOY
SPIN WAVES
THIN FILMS
VELOCITY
WAVEGUIDES