Controlled exciton–plasmon coupling in a mixture of ultrathin periodically aligned single-wall carbon nanotube arrays

We study theoretically the in-plane electromagnetic response and exciton–plasmon interactions for an experimentally feasible carbon nanotube (CN) film system composed of parallel aligned periodic semiconducting CN arrays embedded in ultrathin finite-thickness dielectric. For homogeneous single-CN films, intertube coupling thermal broadening bring exciton interband plasmon resonances closer together. They can even overlap due to inhomogeneous films array mixtures with a slight diameter distribution. In such systems, real part function is negative broad range energies (negative refraction band), behaves as hyperbolic metamaterial. also show that properly fabricated two-component film, by varying relative weights two constituent components, one tune optical absorption profile make transmit or absorb light neighborhood resonance on-demand.