Magnetostatic surface wave bright soliton propagation in ferrite-dielectric-metal structures
| Autor: | Romolo Marcelli, A. V. Kozhevnikov, G. M. Dudko, S. A. Nikitov, A.A. Galishnikov, Yu. A. Filimonov |
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| Jazyk: | angličtina |
| Rok vydání: | 2006 |
| Předmět: |
Physics
Wave propagation business.industry Yttrium iron garnet Computer Science::Software Engineering Nonlinear microwave ferrites Microwave devices Solitons Electronic Optical and Magnetic Materials chemistry.chemical_compound Wavelength Optics Amplitude chemistry Pulse compression Surface wave Soliton Electrical and Electronic Engineering Atomic physics business Phase modulation Modulation instability |
| Zdroj: | IEEE transactions on magnetics 42 (2006): 1785–1801. doi:10.1109/TMAG.2006.872005 info:cnr-pdr/source/autori:Marcelli R, Nikitov SA, Filimonov YA, Gahshnikov AA, Kozhevnikov AV, Dudko GM/titolo:Magnetostatic surface wave bright soliton propagation in ferrite-dielectric-metal structures/doi:10.1109%2FTMAG.2006.872005/rivista:IEEE transactions on magnetics/anno:2006/pagina_da:1785/pagina_a:1801/intervallo_pagine:1785–1801/volume:42 |
| DOI: | 10.1109/TMAG.2006.872005 |
| Popis: | 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 Schro/spl uml/dinger 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-/spl mu/m-thick yttrium iron garnet film, separated from the ground metal by an air gap with thickness h/sub 1//spl ap/100 /spl mu/m or h/sub 2//spl ap/200 /spl mu/m. It was found experimentally for MSSW with wavelength /spl lambda//spl ap/h that the modulation instability leads to soliton formation for rectangular input pulses with duration /spl tau/ less than the characteristic transient time t/sup */ needed for the onset of the parametric instability, while pulses with /spl tau//spl ges/t/sup */ 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 /spl tau//spl ges/t/sup */, 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. |
| Databáze: | OpenAIRE |
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