Sub-picosecond thermalization dynamics in condensation of strongly coupled lattice plasmons
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2020-12-01
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en
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12
1-12
1-12
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Nature Communications, Volume 11, issue 1
Abstract
Bosonic condensates offer exciting prospects for studies of non-equilibrium quantum dynamics. Understanding the dynamics is particularly challenging in the sub-picosecond timescales typical for room temperature luminous driven-dissipative condensates. Here we combine a lattice of plasmonic nanoparticles with dye molecule solution at the strong coupling regime, and pump the molecules optically. The emitted light reveals three distinct regimes: one-dimensional lasing, incomplete stimulated thermalization, and two-dimensional multimode condensation. The condensate is achieved by matching the thermalization rate with the lattice size and occurs only for pump pulse durations below a critical value. Our results give access to control and monitoring of thermalization processes and condensate formation at sub-picosecond timescale. Understanding the sub-picosecond dynamics of driven-dissipative condensates of interacting bosons is challenging. Here the authors combine a lattice of plasmonic nanoparticles with a dye molecule solution in strong coupling and reveal distinct lasing, stimulated thermalization, and condensation regimes.Description
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Väkeväinen, A I, Moilanen, A J, Nečada, M, Hakala, T K, Daskalakis, K S & Törmä, P 2020, ' Sub-picosecond thermalization dynamics in condensation of strongly coupled lattice plasmons ', Nature Communications, vol. 11, no. 1, 3139, pp. 1-12 . https://doi.org/10.1038/s41467-020-16906-1