Storage-Recovery Phenomenon in Magnonic Crystal
Storage-Recovery Phenomenon in Magnonic Crystal
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DOI：
10.1103/physrevlett.108.257207
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发表时间：
2012-06-20
影响因子：
8.6
通讯作者：
Hillebrands, B.
中科院分区：
文献类型：
--
作者：
Chumak, A. V.;Vasyuchka, V. I.;Hillebrands, B.
实验证明了磁振子晶体中相干波的捕获和恢复现象。与光子学中使用的传统方案不同，捕获的发生不是由于入射波进入周期性结构时的减速，而是由于人造晶体的准正规模式的激发。这种激发发生在晶体带隙边缘附近的窄频率区域中的减速波的群速度最小值处。行波的恢复通过存储模式的相敏参量放大来实现。
The phenomenon of coherent wave trapping and restoration is demonstrated experimentally in a magnonic crystal. Unlike the conventional scheme used in photonics, the trapping occurs not due to the deceleration of the incident wave when it enters the periodic structure but due to excitation of the quasinormal modes of the artificial crystal. This excitation occurs at the group velocity minima of the decelerated wave in narrow frequency regions near the edges of the band gaps of the crystal. The restoration of the traveling wave is implemented by means of phase-sensitive parametric amplification of the stored mode.