Articolo in rivista, 2006, ENG, 10.1109/TMAG.2006.872005

Magnetostatic surface wave bright soliton propagation in ferrite-dielectric-metal structures

Marcelli R, Nikitov SA, Filimonov YA, Gahshnikov AA, Kozhevnikov AV, Dudko GM

a CNR-IMM, Rome Section, Microwave Microsystems Technology Group, 00133 Rome, Italy b Institute of Radioengineering and Electronics, RAS, Moscow 103907, Russian Federation c Institute of Radioengineering and Electronics, RAS, Saratov 410019, Russian Federation

Magnetostatic surface wave (MSSW) bright solitons in a ferrite-dielectric-metal (FDM) structure have been studied experimentally and numerically in the framework of the nonlinear. Schrodinger equation. Attention was focused on the influence of the parametric instability on the soliton formation and propagation. We also discussed the contribution of the nonsolitary (dispersive wave) part of the MSSW pulse on the soliton propagation, to show that their mutual interference leads to the leveling off or to the appearance of some peaks in the MSSW pulse output versus the input amplitude. We have also shown that for MSSW pulses with rectangular shape, the linear pulse compression caused by an induced phase modulation of the input pulse must be taken into account. Experiments were performed on FDM microstrip structures loaded by a 14-mu m-thick yttrium iron garnet film, separated from the ground metal by an air gap with thickness h(1) approximate to 100 mu m or h(2) approximate to 200 mu m. It was found experimentally for MSSW with wavelength lambda approximate to h. that the modulation instability leads to soliton formation for rectangular input pulses with duration T less than the characteristic transient time t* needed for the onset of the parametric instability, while pulses with T >= t* are mainly subjected to parametric instability. The measured threshold amplitudes for parametric and modulation instabilities are in agreement with the theoretical predictions. An influence of additional pumping in the form of both continuous-wave and pulsed signals on the soliton formation was studied. It was shown that an additional pumping signal with duration tau >= t*, and amplitude above the threshold of the parametric instability, suppressed the MSSW soliton. Numerical modeling of the pulsewidth dependence on the microwave power during the propagation in the FDM structure yields results that are in agreement with the experimental observations. Moreover, pulse narrowing due to the induced phase modulation of the input pulse was numerically predicted. All of these effects are in agreement with the experimental findings.

IEEE transactions on magnetics 42 (7), pp. 1785–1801

Keywords

Microwave devices, Modulation instability, Nonlinear microwave ferrites, Solitons

CNR authors

Marcelli Romolo

CNR institutes

IMM – Istituto per la microelettronica e microsistemi

ID: 35916

Year: 2006

Type: Articolo in rivista

Creation: 2009-06-16 00:00:00.000

Last update: 2021-04-01 10:55:04.000

CNR authors

External links

OAI-PMH: Dublin Core

OAI-PMH: Mods

OAI-PMH: RDF

DOI: 10.1109/TMAG.2006.872005

External IDs

CNR OAI-PMH: oai:it.cnr:prodotti:35916

DOI: 10.1109/TMAG.2006.872005

Scopus: 2-s2.0-33746339961