Polarized control of probe absorption in a single-layer graphene nanostructure system

Abstract

In this paper, we investigated the behaviors of the absorptive-dispersive properties of weak probe light based on quantum coherence and interference in a Landau-quantized graphene nanostructure driven by coherent pumping fields. The linear dynamical properties of the grapheme are discussed with reference to the density matrix method and the perturbation theory. It is found that under certain conditions and by an appropriate selection of the parameters of the medium, the absorption, dispersion and group index of the weak probe light can be controlled. Moreover, the superluminal light propagation in the system is accompanied by amplification to make sure that the probe field is amplified as it passes through the system via adjusting the corresponding controllable parameters such as the intensity, the detuning and the relative phase of the applied fields. Moreover, it is observed that the probe amplification can be obtained in the presence or absence of population inversion by properly choosing the system’s parameters. We hope that these results may have useful application in future quantum communicational systems and networks.

Introducing theLaser PhysicsandLaser Physics Lettershighlights of 2016

“…• Silver nanoparticle-film based saturable absorber for passively Q-switched erbiumdoped fiber laser (EDFL) in ring cavity configuration-a passively Q-switched fiber laser based on a silver nanoparticle thin-film saturable absorber is demonstrated, with the saturable absorber sandwiched between two fiber ferrules, which offers simplicity, flexibility and easy integration into the laser cavity [54]. • Polarized control of probe absorption in a single-layer graphene nanostructure systemthe behaviours of the absorptive-dispersive properties of weak probe light based on quantum coherence and interference in a Landau-quantized graphene nanostructure driven by coherent pumping fields are investigated [55]. • Random lasing from Rhodamine 6G doped ethanediol solution based on the cicada wing nanocones-random lasing from Rh6G doped ethanediol solution based on a cicada wing nanocones array as the scattering face and an Al-coated reflector as the fully reflecting face is demonstrated [56].…”

Dynamical and steady-state properties of absorption-dispersion curves in a monolayer graphene system

“…Interference between three-photon and one photon excitations, and the phase control of light propagation in a four-level atomic system has been experimentally reported [14]. There are many interesting works based on quantum coherence and interference which have been reports in semiconductor quantum wells, quantum dots and the monolayer of a graphene system in recent years [15][16][17][18][19][20][21].…”