Tunable broadband plasmonic perfect absorber at visible frequency
Tunable broadband plasmonic perfect absorber at visible frequency
复制标题
DOI：
10.1007/s00339-012-7344-1
复制
发表时间：
2012-12-01
影响因子：
2.7
通讯作者：
Elbahri, Mady
中科院分区：
文献类型：
--
作者：
Hedayati, Mehdi Keshavarz;Faupel, Franz;Elbahri, Mady
超材料和等离子体是光子学中的一个新的前沿领域，它将光子与金属的传导电子耦合成表面等离子体，将光子学和电子学的特性结合在一起。这一概念已被实现的各种应用，包括负折射率，在可见光频率的磁性，隐身设备等。在目前的工作中，我们使用等离子体混合材料，以设计和制造一个宽带完美的等离子体超材料吸收器的金属和铜-PTFE（聚四氟乙烯）纳米复合材料的堆栈，显示在整个可见光谱的平均吸收率为97.5%。我们的实验结果表明，由于等离子体共振对环境的敏感性，可以通过改变间隔层的厚度和类型来调节叠层的吸收峰。据我们所知，这是基于铜的等离子体超材料吸收体的第一份报告，在整个可见光和近红外（NIR）中吸收率约为100%。
Metamaterials and plasmonics as a new pioneering field in photonics joins the features of photonics and electronics by coupling photons to conduction electrons of a metal as surface plasmons (SP). This concept has been implemented for a variety of applications including negative index of refraction, magnetism at visible frequency, cloaking devices amongst others. In the present work, we used plasmonic hybrid material in order to design and fabricate a broad-band perfect plasmonic metamaterial absorber in a stack of metal and Copper-PTFE (Polytetrafluoroethylene) nanocomposite showing an average absorbance of 97.5 % in the whole visible spectrum. Our experimental results showed that the absorption peak of the stacks can be tuned upon varying the thickness and type of the spacer layer due to the sensitivity of plasmon resonance to its environment. To the best of our knowledge, this is the first report of a plasmonic metamaterial absorber based on copper with absorption around 100 % in the entire visible and near-Infrared (NIR).