周期性激光图案激发的自旋波的可调谐准离散光谱

IF 2.7 3区 物理与天体物理 Q2 PHYSICS, APPLIED Journal of Applied Physics Pub Date : 2024-08-09 DOI:10.1063/5.0216091
Ia. A. Filatov, P. I. Gerevenkov, N. E. Khokhlov, A. M. Kalashnikova
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引用次数: 0

摘要

我们提出了一种利用空间图案化飞秒激光脉冲诱导磁各向异性超快变化或反法拉第效应,选择性激发具有准离散频谱的磁静电表面波的概念。我们用微磁模拟了周期性图案化单极或双极激光冲击波的激发。这种激发产生了以不同群速度传播的多个波包,其色散与一组准离散点相对应。此外,我们还展示了光谱峰值的频率可由周期性撞击的极性及其空间周期控制。将多个空间周期性磁静力表面波源作为一个整体来考虑,可以实现时空光学方法的综合工具包,从而实现自旋波参数的可调激励和控制。
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Tunable quasi-discrete spectrum of spin waves excited by periodic laser patterns
We present a concept for selective excitation of magnetostatic surface waves with a quasi-discrete spectrum using spatially patterned femtosecond laser pulses inducing either an ultrafast change of magnetic anisotropy or an inverse Faraday effect. We micromagnetically simulate the excitation of the waves with a periodically patterned uni- or bipolar laser impact. Such excitation yields multiple wavepackets propagating with different group velocities, whose dispersion corresponds to the set of quasi-discrete points. In addition, we show that the frequency of the spectral peaks can be controlled by the polarity of the periodic impact and its spatial period. The presented consideration of multiple spatially periodic magnetostatic surface wave sources as a whole enables implementation of a comprehensive toolkit of spatiotemporal optical methods for tunable excitation and control of spin-wave parameters.
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来源期刊
Journal of Applied Physics
Journal of Applied Physics 物理-物理:应用
CiteScore
5.40
自引率
9.40%
发文量
1534
审稿时长
2.3 months
期刊介绍: The Journal of Applied Physics (JAP) is an influential international journal publishing significant new experimental and theoretical results of applied physics research. Topics covered in JAP are diverse and reflect the most current applied physics research, including: Dielectrics, ferroelectrics, and multiferroics- Electrical discharges, plasmas, and plasma-surface interactions- Emerging, interdisciplinary, and other fields of applied physics- Magnetism, spintronics, and superconductivity- Organic-Inorganic systems, including organic electronics- Photonics, plasmonics, photovoltaics, lasers, optical materials, and phenomena- Physics of devices and sensors- Physics of materials, including electrical, thermal, mechanical and other properties- Physics of matter under extreme conditions- Physics of nanoscale and low-dimensional systems, including atomic and quantum phenomena- Physics of semiconductors- Soft matter, fluids, and biophysics- Thin films, interfaces, and surfaces
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