Tunable ultrafast control of plasmonic coupling to gold films
Tunable ultrafast control of plasmonic coupling to gold films
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DOI：
10.1103/physrevb.80.245420
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发表时间：
2009-12-01
影响因子：
3.7
通讯作者：
van Driel, Henry M.
中科院分区：
文献类型：
--
作者：
Rotenberg, Nir;Caspers, Jan N.;van Driel, Henry M.
在很宽的波长范围(540-700 nm)内，我们展示了在带有PMMA光栅覆盖层的金膜上自由空间辐射到表面等离子激元模式的耦合效率的超快调制。我们在共振中心观察到高达14%的调制幅度，或在外围区域观察到高达61%的调制幅度。通过对金的非平衡电子热动力学和光栅结构响应的模拟，探讨了这种方法的局限性。
We demonstrate ultrafast modulation of the coupling efficiency of free-space radiation to a surface plasmon polariton mode on a gold film with a PMMA grating overlayer over a broad range of wavelengths (540-700 nm). We observe modulation magnitudes of up to 14% at the center of the resonance, or 61% at the outlying regions. The limitations of this method are explored using simulations of the nonequilibrium electron thermal dynamics of the gold and of the response of the grating structure.