Nanostructured graphene metasurface for tunable terahertz cloaking
Nanostructured graphene metasurface for tunable terahertz cloaking
复制标题
DOI：
10.1088/1367-2630/15/12/123029
复制
发表时间：
2013-12-17
影响因子：
3.3
通讯作者：
Alu, Andrea
中科院分区：
文献类型：
--
作者：
Chen, Pai-Yen;Soric, Jason;Alu, Andrea
我们提出并分析了一种基于石墨烯的隐身准表面，旨在实现太赫兹(THz)光谱中的宽可调散射抵消。这种一个原子厚度的地幔斗篷是通过一个由周期性石墨烯贴片阵列组成的有图案的超表面来实现的，其表面阻抗可以用简单而准确的解析表达式来建模。通过调整石墨烯纳米片的几何形状和费米能量，介面电抗可以作为相对动感电感和几何贴片电容的函数从电感调节到电容，从而可以用相同的介电表面有效地覆盖太赫兹频率下的介电和导电物体。我们展望了低可观测性纳米结构和高效太赫兹传感、布线和检测的应用。
We propose and analyze a graphene-based cloaking metasurface aimed at achieving widely tunable scattering cancelation in the terahertz (THz) spectrum. This 'one-atom-thick' mantle cloak is realized by means of a patterned metasurface comprised of a periodic array of graphene patches, whose surface impedance can be modeled with a simple yet accurate analytical expression. By adjusting the geometry and Fermi energy of graphene nanopatches, the metasurface reactance may be tuned from inductive to capacitive, as a function of the relative kinetic inductance and the geometric patch capacitance, enabling the possibility of effectively cloaking both dielectric and conducting objects at THz frequencies with the same metasurface. We envision applications for low-observable nanostructures and efficient THz sensing, routing and detection.