Low-loss negative-index metamaterial at telecommunication wavelengths
Low-loss negative-index metamaterial at telecommunication wavelengths
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DOI：
10.1364/ol.31.001800
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发表时间：
2006-06-15
期刊：
影响因子：
3.6
通讯作者：
Linden, Stefan
中科院分区：
文献类型：
--
作者：
Dolling, Gunnar;Enkrich, Christian;Linden, Stefan
基于最近提出的一种理论设计方案，我们制备并表征了一种低损耗的银基负折射率超材料。将测量的透射率和反射率光谱与理论结果进行了比较，结果吻合较好。我们在1.5微米波长附近恢复了Re(N)=-2的折射率的实部。在Re(N)=-1的光谱位置，折射率的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所有负折射率光子超材料中最好的品质因数。(C)2006年美国光学学会。
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 mu m 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 metarnaterial to date. (c) 2006 Optical Society of America.