论文标题
在超薄的超薄单壁碳纳米管阵列中的混合物中受控的激子 - 平面耦合
Controlled Exciton-Plasmon Coupling in a Mixture of Ultrathin Periodically Aligned Single-Wall Carbon Nanotube Arrays
论文作者
论文摘要
从理论上讲，我们研究了实验可行的碳纳米管（CN）膜系统的平面内电磁反应和激子 - 平面相互作用，该膜系统由嵌入在超级超厚的thickness介电介质中的平行对齐的周期性半导体CN阵列组成。对于均匀的单个CN膜，InterTube耦合和热拓宽使激子和频带等离子共振更加紧密。由于由阵列混合物组成的薄膜不均匀扩展，它们甚至可以重叠，并具有轻微的CN直径分布。在这样的系统中，响应函数的实际部分对于广泛的能量（负折射带）为负，并且CN膜作为双曲线超材料的表现。我们还表明，对于正确制造的两种组件CN膜，通过改变两个组成的CN阵列组件的相对权重，可以调整光学吸收曲线，以使膜在激光吸收共振的附近传播或吸收光线。
We study theoretically the in-plane electromagnetic response and the exciton-plasmon interactions for an experimentally feasible carbon nanotube (CN) film systems composed of parallel aligned periodic semiconducting CN arrays embedded in an ultrathin finite-thickness dielectric. For homogeneous single-CN films, the intertube coupling and thermal broadening bring the exciton and interband plasmon resonances closer together. They can even overlap due to the inhomogeneous broadening for films composed of array mixtures with a slight CN diameter distribution. In such systems the real part of the response function is negative for a broad range of energies (negative refraction band), and the CN film behaves as a hyperbolic metamaterial. We also show that for a properly fabricated two-component CN film, by varying the relative weights of the two constituent CN array components one can tune the optical absorption profile to make the film transmit or absorb light in the neighborhood of an exciton absorption resonance on-demand.
