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首页> 外文会议>Conference on Ultrafast Phenomena in Semiconductors and Nanostructure Materials; 20080120-23; San Jose,CA(US) >Spinplasmonics: Controlling Plasmons at the Quantum Level
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Spinplasmonics: Controlling Plasmons at the Quantum Level

机译：Spinplasmonics：在量子水平上控制等离子。

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摘要

We describe a new mechanism for ultrafast active control of plasmon propagation. By using time-domain terahertz spectroscopy, we demonstrate that electron spin state can influence plasmon propagation. Using a random spinplasmonic medium consisting of a dense ensemble of bimetallic ferromagnetic (F)onmagnetic (N) microparticles, plasmon propagation velocity, amplitude attenuation, phase retardation and magnetic field dependence are shown to be influenced by electron spin accumulation in the nonmagnetic layers. The observation of electron spin accumulation is attributed to the formation of a nonequilibrium spin-dependent potential barrier at the F/N interface that acts to resist the flow of a spin-polarized plasmon current. This phenomenon is similar to the electrically-driven spin accumulation phenomenon resulting from current transport between F/N layers. With this first demonstration of the merger between the plasmonics and spintronics fields, we envision the realization of a new class of ultrafast spinplasmonic devices having unique functionalities.
机译：我们描述了超快主动控制等离激元传播的新机制。通过使用时域太赫兹光谱，我们证明了电子自旋状态可以影响等离子体激元的传播。使用由双金属铁磁（F）/非磁性（N）微粒的密集集合组成的随机自旋等离子体介质，显示了等离子体激元传播速度，幅度衰减，相位延迟和磁场依赖性受非磁性层中电子自旋累积的影响。电子自旋积累的观察结果归因于在F / N界面上形成了一个非平衡自旋相关势垒，该势垒起着抵抗自旋极化等离子体激元电流的作用。这种现象类似于由F / N层之间的电流传输导致的电驱动自旋累积现象。通过等离子技术和自旋电子学领域合并的第一个演示，我们设想实现具有独特功能的新型超快自旋等离子设备。

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