Quantitative Experimental Determination of Scattering and Absorption Cross-Section Spectra of Individual Optical Metallic Nanoantennas
Quantitative Experimental Determination of Scattering and Absorption Cross-Section Spectra of Individual Optical Metallic Nanoantennas
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DOI：
10.1103/physrevlett.109.233902
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发表时间：
2012-12-04
影响因子：
8.6
通讯作者：
Wegener, Martin
中科院分区：
文献类型：
--
作者：
Husnik, Martin;Linden, Stefan;Wegener, Martin
天线将传播的辐射转化为局部的电磁能和热能。为了明确区分这两个方面，需要定量地确定天线散射和吸收截面光谱。利用空间调制技术，结合共程干涉仪和光刻制作的单个金纳米天线，首次在实验上定量测定了不同光学天线的散射和吸收截面光谱。DOI: 10.1103 / PhysRevLett.109.233902
Antennas convert propagating radiation to localized electromagnetic energy and to heat. To unambiguously separate between these two aspects, one needs to quantitatively determine the antenna scattering and absorption cross-section spectra. By using a spatial modulation technique combined with a common-path interferometer and lithographically fabricated individual gold nanoantennas, we experimentally determine the scattering and absorption cross-section spectra of different optical antennas simultaneously and quantitatively for the first time. DOI: 10.1103/PhysRevLett.109.233902