• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Bulletin of the American Physical Society >APS -Annual Meeting of the APS Four Corners Section- Event - Spin-wave fractals in a quasi-one-dimensional magnonic crystal
【24h】

APS -Annual Meeting of the APS Four Corners Section- Event - Spin-wave fractals in a quasi-one-dimensional magnonic crystal

机译：APS-APS四角截面年会-事件-准一维大分子晶体中的自旋波分形

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Fractals are a ubiquitous phenomenon in nonlinear physics and a key facet of natural systems, from the lungs in our bodies to attractors underlying the weather. Spin-wave fractals have previously been observed in a Y$_{mathrm{3}}$Fe$_{mathrm{5}}$O$_{mathrm{12}}$ (YIG) thin film-based active feedback ring, where the periodic amplification ensures the strong nonlinearity of the spin waves, while the periodic feedback was used as a time-dependent potential to create regions of large dispersion in the spin-wave spectrum. Strong nonlinearity and high dispersion are two essential ingredients needed for fractal development. This presentation reports for the first time that it is also possible to use a position-dependent potential to create the large dispersion necessary for fractal formation. As the power ($P_{mathrm{in}})$ delivered to the magnonic crystal increases, one observes that a frequency comb forms around the input microwave frequency ($f_{mathrm{0}})$, where the strongest peak sits at $f_{mathrm{0}}$. As $P_{mathrm{in}}$ is increased further, each peak in the comb evolves into its own, finer frequency comb. If $P_{mathrm{in}}$ is increased even further, one can observe yet another set of finer frequency combs.
机译：分形是非线性物理学中普遍存在的现象，也是自然系统的一个重要方面，从人体的肺部到天气的吸引子。以前在Y $ _ {mathrm {3}} $ Fe $ _ {mathrm {5}} $ O $ _ {mathrm {12}} $（YIG）薄膜有源反馈环中观察到自旋波分形，其中周期性放大可确保自旋波具有很强的非线性度，而周期性反馈被用作随时间变化的电位，以在自旋波谱中创建较大色散的区域。强烈的非线性和高色散是分形发展所需的两个基本要素。该报告首次报告，也有可能使用位置相关的电位来创建分形形成所必需的大分散体。随着传递到强子晶体的功率（$ P_ {mathrm {in}}）$增加，人们观察到在输入微波频率（$ f_ {mathrm {0}}）$附近形成了一个频率梳，其中最强的峰位于在$ f_ {mathrm {0}} $。随着$ P_ {mathrm {in}} $进一步增加，梳状结构中的每个峰值都会演变成自己的更精细的频率梳状结构。如果$ P_ {mathrm {in}} $进一步增加，则可以观察到另一组更精细的频率梳。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号