A gigahertz-range spin-wave filter composed of width-modulated nanostrip magnonic-crystal waveguides
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- A gigahertz-range spin-wave filter composed of width-modulated nanostrip magnonic-crystal waveguides
- Kim, Sang-Koog; Lee, Ki-Suk; Han, Dong-Soo
- Band gaps; Crystal waveguides; Information transmission; Nanostrips; Narrow bands; One step; One-dimensional; Practical implementation; Processing device; Thin-films; Translation symmetry
- Issue Date
- AMER INST PHYSICS
- APPLIED PHYSICS LETTERS, v.95, no.8, pp.1 - 3
- 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.
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