Dolling Gunnar, Enkrich Christian, Wegener Martin, Soukoulis Costas M, Linden Stefan
Institut für Angewandte Physik, Universität Karlsruhe, TH, Wolfgang-Gaede-Strass 1, D-76131 Karlsruhe, Germany.
Opt Lett. 2006 Jun 15;31(12):1800-2. doi: 10.1364/ol.31.001800.
We fabricate and characterize a low-loss silver-based negative-index metamaterial based on the design of a recent theoretical proposal. Comparing the measured transmittance and reflectance spectra with theory reveals good agreement. We retrieve a real part of the refractive index of Re(n)= -2 around 1.5 microm wavelength. The maximum of the ratio of the real to the imaginary part of the refractive index is about three at a spectral position where Re(n)= -1. To the best of our knowledge, this is the best figure of merit reported for any negative-index photonic metamaterial to date.
我们基于最近的一项理论提议的设计，制造并表征了一种低损耗的银基负折射率超材料。将测量得到的透射率和反射率光谱与理论进行比较，结果显示吻合度良好。我们在波长约1.5微米处测得折射率实部Re(n) = -2。在Re(n) = -1的光谱位置，折射率实部与虚部之比的最大值约为3。据我们所知，这是迄今为止报道的任何负折射率光子超材料的最佳品质因数。
