Surface plasmons modulate the spatial coherence of light in Young's interference experiment
Surface plasmons modulate the spatial coherence of light in Young's interference experiment
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DOI：
10.1103/physrevlett.98.043908
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发表时间：
2007-01-26
影响因子：
8.6
通讯作者：
Visser, Taco D.
中科院分区：
文献类型：
--
作者：
Gan, Choon How;Gbur, Greg;Visser, Taco D.
它示出了如何在杨氏干涉实验中的狭缝之间的表面等离子体激元可以改变由两个孔径辐射的场的空间相干性的状态。令人惊讶的是，相干性可以增加和减少，这取决于狭缝间隔距离。这导致干涉条纹的可见度的调制。由于光场的许多特性，如光谱、偏振和方向性，在传播过程中可能会发生变化，并且依赖于光源的空间相干性，因此我们的研究结果表明，表面等离子体激元的使用提供了一种新的方法来改变甚至调整光场的统计特性。
It is shown how surface plasmons that travel between the slits in Young's interference experiment can change the state of spatial coherence of the field that is radiated by the two apertures. Surprisingly, the coherence can both be increased and decreased, depending on the slit separation distance. This results in a modulation of the visibility of the interference fringes. Since many properties of a light field-such as its spectrum, polarization, and directionality-may change on propagation and are dependent on the spatial coherence of the source, our results suggest that the use of surface plasmons provides a new way to alter or even tailor the statistical properties of a light field.