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arXiv 2111.05511physics.optics
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等离子体激元纳米间隙谐振腔中的极限电场

Limit possible electric field in plasmon nanogap resonator

Andrey K. Sarychev, Andrey V. Ivanov, Grégory Barbillon

摘要:

我们提出了在金属表面上的金属圆柱形成的超窄等离子体间隙中激发等离子体激元的理论,该间隙产生了巨大的光频共振局域电磁场。发现了共振条件,估算了纳米间隙中电场的最大可能增强为$\left|E_{max} \right|/ \left| E_{0} \right| \propto \left| \varepsilon_m \right|^{3} \varepsilon_{d}^{-1} \left( \Im \varepsilon_{m}\right) ^{-2}$一种简单的超窄间隙共振器可用于吸附分子的SERS传感和红外光谱。我们假设等离子体纳米间隙是增加等离子体增强光谱仪的灵活性和灵敏度的最简单和最直接的方法。

英文摘要:

We propose the theory of the plasmon excited in ultra-narrow plasmonic gap formed by a metal cylinder on a metal surface, that generates a huge resonant local electromagnetic field in optical frequencies. Resonance conditions are found. The maximum possible enhancement of the electric field in the nanogap is estimated as $\left|E_{max} \right|/ \left| E_{0} \right| \propto \left| \varepsilon_m \right|^{3} \varepsilon_{d}^{-1} \left( \Im \varepsilon_{m}\right) ^{-2}$ A simple ultranarrow-gaped resonator can be used for SERS sensing and infrared spectroscopy of adsorbed molecules. We assume that a plasmonic nanogap is simplest and most straightforward way to increase flexibility as well as sensitivity of the plasmon-enhanced spectroscopes.

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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