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arXiv 1506.04510cond-mat.mes-hall
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用于单个碳纳米管定向拉曼研究的定制纳米天线

Tailored nano-antennas for directional Raman studies of individual carbon nanotubes

Nicola Paradiso, Fatemeh Yaghobian, Christoph Lange, Tobias Korn, Christian Schüller, Rupert Huber, Christoph Strunk

摘要:

我们利用纳米天线的近场增强来研究光学检测不到的碳纳米管(CNT)的拉曼光谱。我们证明,自上而下的制造方法是特别有前途的,当应用到碳纳米管,由于入射光偏振和CNT轴之间的角度的散射强度的急剧依赖。与尖端增强技术相比,我们的方法使我们能够控制样品平面中的光偏振,局部放大和旋转入射场,从而优化拉曼信号。这些有前途的功能证实了这里提出的数值模拟。制造和对准的相对容易性使得该技术适合于实现将扫描探针、光学和传输表征相结合的集成器件。

英文摘要:

We exploit the near field enhancement of nano-antennas to investigate the Raman spectra of otherwise not optically detectable carbon nanotubes (CNTs). We demonstrate that a top-down fabrication approach is particularly promising when applied to CNTs, owing to the sharp dependence of the scattered intensity on the angle between incident light polarization and CNT axis. In contrast to tip enhancement techniques, our method enables us to control the light polarization in the sample plane, locally amplifying and rotating the incident field and hence optimizing the Raman signal. Such promising features are confirmed by numerical simulations presented here. The relative ease of fabrication and alignment makes this technique suitable for the realization of integrated devices that combine scanning probe, optical, and transport characterization.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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