2019/05/23 by Mariam M. Tohari, Tohari, Mariam, A. Lyras +3
Engineering · Materials Science · #FOS: Physical sciences #Gold and Silver Nanoparticles Synthesis and Applications #Nonlinear Optical Materials Studies #Optics (physics.optics) #Plasmonic and Surface Plasmon Research
paper · pdf · doi:10.48550/arxiv.1905.09953
openalex publication_date 2019/05/23 · openalex created_date 2022/07/29 · openalex updated_date 2026/07/28
Active nanoplasmonics has recently led to the emergence of many promising\napplications. One of them is spaser (surface plasmons amplification by\nstimulated emission of radiation) that has been shown to generate coherent and\nintense fields of selected surface plasmon modes that are strongly localized in\nthe nanoscale. We propose a novel nanospaser composed of metal\nnanoparticles-graphene nanodisks hybrid plasmonic system as its resonator and a\nquantum dots cascade stack as its gain medium. We derive the plasmonic fields\ninduced by pulsed excitation through the use of the effective medium theory.\nBased on the density matrix approach and by solving the Lindblad quantum master\nequation, we get ultrafast dynamics of the spaser associated with coherent\namplified plasmonic fields. The intensity of the latter is significantly\naffected by the width of the metallic contact and the time duration of the\nlaser pulse used to launch the surface plasmons. The proposed nanospaser\noperates in the mid-infrared region that has received much attention due to its\nwide biomedical, chemical and telecommunication applications.\n