...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Physical review >Plasmonic response of STM tips
【24h】

Plasmonic response of STM tips

机译：STM尖端的等离子体响应

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

We present theoretical studies of the plasmonic response of STM tips near substrates, with emphasis on the influence of tip shape and topology on its plasmonic resonances. The calculations employ COMSOL software. We find, for tips made of Ag, a plasmonic resonance in the 600-700 nm wavelength regime, which is well below the spectral range where one encounters surface and tip plasmons in electrostatic theory for Ag based structures. A similar low-energy resonance is found for Au tips. We present calculations of light emission spectra, wherein the light emission is stimulated by the noise necessarily present on a dc tunneling current. The calculated spectra are similar to those observed in recent experiments. We also discuss excitation of the low-frequency resonance by means of an external laser beam, and for both laser excitation and excitation by current noise we explore the relative strength of the low-frequency resonance and the "classical" tip/substrate plasmons in the 3.5 eV spectral range. The results suggest future experimental studies.
机译：我们目前对基质附近的STM尖端的等离子体响应的理论研究，重点是尖端形状和拓扑对其等离子体共振的影响。计算使用COMSOL软件。对于由Ag制成的尖端，我们发现在600-700nm波长范围内的等离子体共振，这远低于在基于静电的基于Ag的结构的理论中人们遇到表面和尖端等离子体激元的光谱范围。对于Au尖端发现了类似的低能共振。我们介绍了光发射光谱的计算，其中光发射是由直流隧穿电流上必然存在的噪声激发的。计算的光谱类似于最近的实验中观察到的光谱。我们还讨论了通过外部激光束激发低频共振的方法，对于激光激发和电流噪声激发，我们都研究了低频共振和“经典”尖端/基片等离子体激元的相对强度。 3.5 eV频谱范围。结果表明未来的实验研究。

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