Ultrashort Pulse Generation in Spaser Through Nonlinear Regime

A complete Jacobi Elliptic Functions (JEFs)-based model is developed for describing the dynamical behavior of Surface Plasmons (SPs) in a plasmonic waveguide and nanolaser (spaser). JEFs are arranged in two Down Asymptotic (DA) and Up Asymptotic (UA) solutions. DA stand for the large absorption coefficient and subsequently, the linear state while the UA are ascribed to the large nonlinearity. The large absorption coefficient causes decaying feature of SPs as anticipated. The huge nonlinearity can lead to the generation of ultrafast pulses in a SP nanolaser (spaser). It is thus learnt that one can study the quantum effects of a spaser system on a mesoscopic scale, instead of having to treat SPs as individual quasi-particles.