Lightwave-driven quasiparticle collisions on a subcycle timescale

F. Langer, M. Hohenleutner, C. P. Schmid, C. Poellmann, P. Nagler, T. Korn, C. Schüller, M. S. Sherwin, U. Huttner, J. T. Steiner, Stephan W Koch, M. Kira, R. Huber

Research output: Contribution to journalArticle

93 Citations (Scopus)

Abstract

Ever since Ernest Rutherford scattered α-particles from gold foils, collision experiments have revealed insights into atoms, nuclei and elementary particles. In solids, many-body correlations lead to characteristic resonances - called quasiparticles - such as excitons, dropletons, polarons and Cooper pairs. The structure and dynamics of quasiparticles are important because they define macroscopic phenomena such as Mott insulating states, spontaneous spin- and charge-order, and high-temperature superconductivity. However, the extremely short lifetimes of these entities make practical implementations of a suitable collider challenging. Here we exploit lightwave-driven charge transport, the foundation of attosecond science, to explore ultrafast quasiparticle collisions directly in the time domain: a femtosecond optical pulse creates excitonic electron-hole pairs in the layered dichalcogenide tungsten diselenide while a strong terahertz field accelerates and collides the electrons with the holes. The underlying dynamics of the wave packets, including collision, pair annihilation, quantum interference and dephasing, are detected as light emission in high-order spectral sidebands of the optical excitation. A full quantum theory explains our observations microscopically. This approach enables collision experiments with various complex quasiparticles and suggests a promising new way of generating sub-femtosecond pulses.

Original languageEnglish (US)
Pages (from-to)225-229
Number of pages5
JournalNature
Volume533
DOIs
StatePublished - May 11 2016
Externally publishedYes

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Elementary Particles
Quantum Theory
Electrons
Tungsten
Gold
Light
Temperature
Superconductivity
LDS 751

ASJC Scopus subject areas

  • Medicine(all)
  • General

Cite this

Langer, F., Hohenleutner, M., Schmid, C. P., Poellmann, C., Nagler, P., Korn, T., ... Huber, R. (2016). Lightwave-driven quasiparticle collisions on a subcycle timescale. Nature, 533, 225-229. https://doi.org/10.1038/nature17958

Lightwave-driven quasiparticle collisions on a subcycle timescale. / Langer, F.; Hohenleutner, M.; Schmid, C. P.; Poellmann, C.; Nagler, P.; Korn, T.; Schüller, C.; Sherwin, M. S.; Huttner, U.; Steiner, J. T.; Koch, Stephan W; Kira, M.; Huber, R.

In: Nature, Vol. 533, 11.05.2016, p. 225-229.

Research output: Contribution to journalArticle

Langer, F, Hohenleutner, M, Schmid, CP, Poellmann, C, Nagler, P, Korn, T, Schüller, C, Sherwin, MS, Huttner, U, Steiner, JT, Koch, SW, Kira, M & Huber, R 2016, 'Lightwave-driven quasiparticle collisions on a subcycle timescale', Nature, vol. 533, pp. 225-229. https://doi.org/10.1038/nature17958
Langer F, Hohenleutner M, Schmid CP, Poellmann C, Nagler P, Korn T et al. Lightwave-driven quasiparticle collisions on a subcycle timescale. Nature. 2016 May 11;533:225-229. https://doi.org/10.1038/nature17958
Langer, F. ; Hohenleutner, M. ; Schmid, C. P. ; Poellmann, C. ; Nagler, P. ; Korn, T. ; Schüller, C. ; Sherwin, M. S. ; Huttner, U. ; Steiner, J. T. ; Koch, Stephan W ; Kira, M. ; Huber, R. / Lightwave-driven quasiparticle collisions on a subcycle timescale. In: Nature. 2016 ; Vol. 533. pp. 225-229.
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