Optical field emission from resonant gold nanorods driven by femtosecond mid-infrared pulses
Optical field emission from resonant gold nanorods driven by femtosecond mid-infrared pulses
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DOI：
10.1063/1.4927151
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发表时间：
2015-07-01
期刊：
影响因子：
1.6
通讯作者：
Ashihara, S.
中科院分区：
文献类型：
--
作者：
Kusa, F.;Echternkamp, K. E.;Ashihara, S.
我们展示了由飞秒中红外光脉冲驱动的金纳米棒的强场光电子发射。在局域表面等离子体共振处达到最大光电子产率，表明光电发射受共振增强光学近场控制。与波长和场相关的光电发射产率允许对局部场增强进行非侵入性确定，并且我们获得接近 1300 的强度增强因子，与有限差分时域计算非常一致。 (C) 2015 年作者。
We demonstrate strong-field photoelectron emission from gold nanorods driven by femtosecond mid-infrared optical pulses. The maximum photoelectron yield is reached at the localized surface plasmon resonance, indicating that the photoemission is governed by the resonantly-enhanced optical near-field. The wavelength-and field-dependent photoemission yield allows for a noninvasive determination of local field enhancements, and we obtain intensity enhancement factors close to 1300, in good agreement with finite-difference time domain computations. (C) 2015 Author(s).