A gigahertz-range spin-wave filter composed of width-modulated nanostrip magnonic-crystal waveguides | Zendy

SangKoog Kim | Zendy; KiSuk Lee | Zendy; DongSoo Han | Zendy

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A gigahertz-range spin-wave filter composed of width-modulated nanostrip magnonic-crystal waveguides

Author(s) -

SangKoog Kim,

KiSuk Lee,

DongSoo Han

Publication year - 2009

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.3186782

Subject(s) - spin wave , waveguide , optics , modulation (music) , planar , materials science , filter (signal processing) , physics , condensed matter physics , ferromagnetism , acoustics , computer science , computer graphics (images) , computer vision

We found a robust magnonic-crystal waveguide structure for use as an efficient gigahertz-range spin-wave filter that passes only spin waves of chosen narrow band frequencies and filters out the other frequencies. The structure consists of the serial combinations of various width modulations with different periodicities and motifs in planar-patterned thin-film nanostrips composed of a single soft magnetic material. The observed magnonic band gaps result from both the translation symmetry of the one-dimensional width modulation and the higher-quantized width-mode spin waves excited from scattering at the periodic edge-steps of the width modulation. This work brings us one step closer to practical implementations of spin waves in information transmission and processing devices.open452

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