Plasmon-Induced Quantum Interference near Carbon Nanostructures

We investigate the spontaneous emission properties of a V-type quantum emitter when interacting with either a graphene monolayer or a single-wall carbon nanotube. Quantum interference (QI) effects in spontaneous emission arise due to the anisotropic Purcell effect in both cases. For a graphene monolayer the degree of QI takes values close to 0.333. For the carbon nanotube the confinement of light in one dimension enhances significantly the degree of QI. The high degree of QI is obtained for different orientations of the respective transition dipoles and for a wide range of the emission energy of the quantum emitter, the chemical potential, and the nanotube radius.