biostudies-literatureRychly-Gruszecka JFoundation of Alfried Krupp Kolleg, GreifswaldNational Science Center, Poland20678https://www.ebi.ac.uk/biostudies/studies/S-EPMC9712760biostudies-literatureUnknown12(1)We present experimental and numerical studies demonstrating the influence of geometrical parameters on the fundamental spin-wave mode in planar 1D magnonic crystals. The investigated magnonic crystals consist of flat stripes separated by air gaps. The adjustment of geometrical parameters allows tailoring of the spin-wave frequencies. The width of stripes and the width of gaps between them affect spin-wave frequencies in two ways. First, directly by geometrical constraints confining the spin waves inside the stripes. Second, indirectly by spin-wave pinning, freeing the spin waves to a different extent on the edges of stripes. Experimentally, the fundamental spin-wave mode frequencies are measured using an all-optical pump-probe time-resolved magneto-optical Kerr-effect setup. Our studies adScientific reportsShaping the spin wave spectra of planar 1D magnonic crystals by the geometrical constraints.PMC97127602017/24/T/ST3/001732020/39/I/ST3/024132020/39/O/ST5/021102018/30/E/ST3/0026Tubandt TMunzenberg MDenker CKlos JWRychly-Gruszecka JWalowski JfalseShaping the spin wave spectra of planar 1D magnonic crystals by the geometrical constraints.We present experimental and numerical studies demonstrating the influence of geometrical parameters on the fundamental spin-wave mode in planar 1D magnonic crystals. The investigated magnonic crystals consist of flat stripes separated by air gaps. The adjustment of geometrical parameters allows tailoring of the spin-wave frequencies. The width of stripes and the width of gaps between them affect spin-wave frequencies in two ways. First, directly by geometrical constraints confining the spin waves inside the stripes. Second, indirectly by spin-wave pinning, freeing the spin waves to a different extent on the edges of stripes. Experimentally, the fundamental spin-wave mode frequencies are measured using an all-optical pump-probe time-resolved magneto-optical Kerr-effect setup. Our studies ad2022-01-01T00:00:00Z2022 Nov2025-04-25T17:11:24.425Z2025-04-06T04:50:55.179ZS-EPMC97127603645079410.1038/s41598-022-24969-x