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Sub-picosecond thermalization dynamics in condensation of strongly coupled lattice plasmons

Author

Listed:
  • Aaro I. Väkeväinen

    (Aalto University School of Science)

  • Antti J. Moilanen

    (Aalto University School of Science)

  • Marek Nečada

    (Aalto University School of Science)

  • Tommi K. Hakala

    (University of Eastern Finland)

  • Konstantinos S. Daskalakis

    (Aalto University School of Science)

  • Päivi Törmä

    (Aalto University School of Science)

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.

Suggested Citation

  • Aaro I. Väkeväinen & Antti J. Moilanen & Marek Nečada & Tommi K. Hakala & Konstantinos S. Daskalakis & Päivi Törmä, 2020. "Sub-picosecond thermalization dynamics in condensation of strongly coupled lattice plasmons," Nature Communications, Nature, vol. 11(1), pages 1-12, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-16906-1
    DOI: 10.1038/s41467-020-16906-1
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