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Generation of traveling surface plasmon waves by free-electron impact

机译:自由电子碰撞产生行进表面等离激元波

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摘要

The injection of a beam of free 50 keV electrons into an unstructured gold surface creates a highly localized source of traveling surface plasmons with spectra centered below the surface plasmon resonance frequency. The plasmons were detected by a controlled decoupling into light with a grating at a distance from the excitation point. The dominant contribution to the plasmon generation appears to come from the recombination of d-band holes created by the electron beam excitation.
机译:将自由的50 keV电子束注入非结构化的金表面会产生高度局限的行进表面等离子体激元,其光谱的中心位于表面等离子体激元共振频率以下。通过在与激发点相距一定距离处通过光栅将其控制解耦为光,从而检测等离激元。对等离子体激元产生的主要贡献似乎来自电子束激发产生的d波段空穴的复合。

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