Ray Emily A, Hampton Meredith J, Lopez Rene
Department of Physics and Astronomy, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA.
Opt Lett. 2009 Jul 1;34(13):2048-50. doi: 10.1364/ol.34.002048.
We demonstrate the fabrication of a simple metamaterial-diffraction grating device that both amplifies and converts evanescent waves into propagating ones. This is the most accessible example of such phenomena reported until now (to our knowledge), as it requires few thin film layers, operates in the visible, and can be probed with traditional optics. The metamaterial exhibits amplification of evanescent waves generated from total internal reflection. The device was fabricated over 1 cm2 using pulsed-laser deposition and a pattern-replication technique.
我们展示了一种简单的超材料衍射光栅装置的制造方法，该装置既能放大倏逝波，又能将其转换为传播波。据我们所知，这是迄今为止报道的此类现象中最容易实现的例子，因为它只需要很少的薄膜层，在可见光范围内工作，并且可以用传统光学方法进行探测。这种超材料能够放大全内反射产生的倏逝波。该装置是使用脉冲激光沉积和图案复制技术在1平方厘米的面积上制造的。
