1112.4367 (Sebastian Wuestner et al.)

Control and Dynamic Competition of Bright and Dark Lasing States in
Active Nanoplasmonic Metamaterials    [PDF]

Sebastian Wuestner, Joachim M. Hamm, Andreas Pusch, Fabian Renn, Kosmas L. Tsakmakidis, Ortwin Hess

Active nanoplasmonic metamaterials support bright and dark modes that compete for gain. Using a Maxwell-Bloch approach incorporating Langevin noise we study the lasing dynamics in an active nano-fishnet structure. We report that lasing of the bright negative-index mode is possible if the higher-Q dark mode is discriminated by gain, spatially or spectrally. The nonlinear competition during the transient phase is followed by steady-state emission where bright and dark modes can coexist. We analyze the influence of pump intensity and polarization and explore methods for mode control.

View original: http://arxiv.org/abs/1112.4367