261 research outputs found
Analysis of a multi-mode plasmonic nano-laser with an inhomogeneous distribution of molecular emitters
We extend Lamb's reduced density matrix laser theory to analyze the
inhomogeneous molecular couplings and the mode-correlation in a plasmonic
nano-laser consisting of a gold sphere and many dye molecules interacting with
a driving optical field and with the quantized plasmon modes. The molecular
inhomogeneity is accounted for by simulating their random distribution around
the sphere. Our analysis shows that in order to obtain lasing we must employ a
large number of strongly driven molecules to compensate strong damping of the
plasmon modes. The compact molecular arrangement, however, can lead to
molecular energy-shifts and thus reduce the excitation of the plasmon modes and
ultimately suggests a maximum limit for the plasmon excitation for any specific
system.Comment: 7 pages of main text, 8 pages of appendix, 8 figure
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