Poujet Y, Salvi J, Baida F I, van Labeke D, Perentes A, Santschi C, Hoffmann P
Institut FEMTO-ST UMR 6174, Département d'Optique P.M. Duffieux, Université de Franche-Comté, 16 route de Gray, 25030 Besançon Cedex, France.
J Microsc. 2008 Feb;229(Pt 2):203-9. doi: 10.1111/j.1365-2818.2008.01887.x.
In this paper, we present near-field optical images of nanostructures exhibiting an extraordinary transmission. These structures consist of annular aperture arrays engraved in a metallic film: they are quite promising structures for nanophotonics because of their high transmission directly linked to a guided mode mediated by each annular aperture. We first briefly explain our fabrication process (focused ion beam milling), then we expose the experimental setup of the near-field optical microscope working both in reflection and transmission modes. For the reflection mode, the 'coffee-bean' structure of the electromagnetic field predicted by the theory has been quite well reproduced. For the transmission mode, we present preliminary experimental results concerning the influence of the wavelength and the polarization of the incident beam on the obtained near-field images.
在本文中，我们展示了呈现异常透射的纳米结构的近场光学图像。这些结构由刻蚀在金属薄膜中的环形孔径阵列组成：由于其高透射率直接与每个环形孔径介导的导模相关，它们是纳米光子学中非常有前景的结构。我们首先简要解释我们的制造工艺（聚焦离子束铣削），然后介绍在反射和透射模式下工作的近场光学显微镜的实验装置。对于反射模式，理论预测的电磁场的“咖啡豆”结构得到了很好的再现。对于透射模式，我们给出了关于入射光束的波长和偏振对所获得的近场图像影响的初步实验结果。
