jz9b01076_si_003.avi (99.58 kB)
Ultrafast Dynamics of Lattice Plasmon Lasers
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posted on 2019-06-03, 18:35 authored by Weijia Wang, Nicolas Watkins, Ankun Yang, Richard D. Schaller, George C. Schatz, Teri W. OdomLattice plasmon cavity
modes combined with optical gain can exhibit
directional and tunable lasing emission at room temperature. However,
the mechanistic details governing the dynamics before lasing action
are not understood. This paper describes how the long photon lifetimes
of lattice plasmon modes can be correlated with the ultrafast dynamics
of lasing action and amplified spontaneous emission. Lasing from band-edge
plasmons and amplified spontaneous emission from propagating plasmons
showed rise times on the order of tens of picoseconds, during which
inverted population in the gain was first generated and then followed
by energy transfer to the lattice plasmon cavity for enhanced light
emission.