Emergence of Plasmaronic Structure in the Near Field Optical Response of Graphene

Details Emergence of Plasmaronic Structure in the Near Field Optical Response of Graphene Emergence of Plasmaronic Structure in the Near Field Optical Response of Graphene

2012-03-04

arxiv.org/abs/1203.0745v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 4 figures, submitted to Phys. Rev

Scientific paper

The finite momentum optical response $\sigma({\boldsymbol{q}},\omega)$ of graphene can be probed with the innovative technique of infrared nanoscopy where mid-infrared radiation is confined by an atomic force microscope cantilever tip. In contrast to conventional $q\sim 0$ optical absorption which primarily involves Dirac fermions with momentum near the Fermi momentum, $k\sim k_F$, for finite $q$, $\sigma({\boldsymbol{q}},\omega)$ has the potential to provide information on many body renormalizations and collective phenomena which have been found at small $k< k_F$ near the Dirac point in electron-doped graphene. For electron-electron interactions, the low energy excitation spectrum characterizing the incoherent part of the quasiparticle spectral function of Dirac electrons with $k\sim k_F$ consists of a flat, small amplitude background which scales with chemical potential and Fermi momentum. However, probing of the states with $k$ near $k=0$ will reveal plasmarons, a collective state of a charge carrier and a plasmon. These collective modes in graphene have recently been seen in angle-resolved photoemission spectroscopy and here we describe how they manifest in near field optics.

Affiliated with

Also associated with

No associations

Rating

Emergence of Plasmaronic Structure in the Near Field Optical Response of Graphene does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Emergence of Plasmaronic Structure in the Near Field Optical Response of Graphene, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Emergence of Plasmaronic Structure in the Near Field Optical Response of Graphene will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-332337