2014/06/17 by Lei Wang, Wei Cai, Wang, Lei +5
Engineering · Materials Science · Physics and Astronomy · #FOS: Physical sciences #Graphene research and applications #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Photonic and Optical Devices #Plasmonic and Surface Plasmon Research #cond-mat.mes-hall
paper · pdf · doi:10.48550/arxiv.1406.4274
5 pages, 6 figures
arxiv created 2014/06/17 · openalex publication_date 2014/06/17 · arxiv updated 2014/06/18 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The interaction between graphene plasmons and surface phonons of a semiconductor substrate is investigated, which can be efficiently controlled by the carrier injection of the substrate. The energy and lifetime of surface phonons in a substrate depend a lot on the carrier concentration, which provides a new machanism to tune plasmon-phonon coupled modes (PPCMs). More specifically, the dispersion and lifetime of PPCMs can be controlled by the carrier concentration change of the substrate. The energy of PPCMs for a given momentum increases as the carrier concentration of a substrate increases. On the other hand, the momentum of PPCMs for a given energy decreases when the carrier concentration of the substrate increases. Lifetime of PPCMs is always larger than the intrinsic lifetime of graphene plasmons without plasmon-phonon coupling.