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We study theoretically the plasmon scattering at the intersection of twometallic carbon nanotubes. We demonstrate that for a small angle of crossing,$\theta \ll 1$, the transmission coefficient is an oscillatory function of$\lambda/\theta$, where $\lambda$ is the interaction parameter of the Luttingerliquid in an individual nanotube. We calculate the tunnel density of states,$\nu(\omega,x)$, as a function of energy, $\omega$, and distance, $x$, from theintersection. In contrast to a single nanotube, we find that, in the geometryof crossed nanotubes, conventional "rapid" oscillations in $\nu(\omega,x)$ dueto the plasmon scattering acquire an aperiodic "slow-breathing" envelope whichhas $\lambda/\theta$ nodes.

Scattering of plasmons at the intersection of two metallic nanotubes: Implications for tunnelling