Control and dynamic competition of bright and dark lasing states in active nanoplasmonic metamaterials

Article

关键词: NEGATIVE-INDEX METAMATERIALS;    LASERS;    GAIN;    SPASER;    NOISE;   

DOI  :  10.1103/PhysRevB.85.201406

来源: SCIE

【 摘 要 】

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 nanofishnet 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.

【 授权许可】

Free