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<p>Terahertz 2D coherent spectroscopy (THz-2DCS) is an emerging technique that brings multidimensional resolution to the ultrafast spectral–temporal dynamics of non-equilibrium&#xa0;quantum phases of matter, enabling new capabilities for precise coherent control in many-body dynamics and multiorder correlations. By mapping and disentangling complex excitation and detection pathways across distinct time and frequency dimensions, THz-2DCS provides a form of coherence tomography of light-induced&#xa0;quantum matter — revealing multiquantum coherences, separating nonlinear response functions and capturing collective modes and quantum kinetics&#xa0;on ultrafast THz timescales. This Perspective discusses the technical capabilities of THz-2DCS, provides a comparison to other multidimensional and coherent transient spectroscopies and looks ahead towards opportunities for advancing THz-2DCS instrumentation and experimental strategies towards new frontier discoveries.</p>

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Terahertz 2D coherent spectroscopy for probing and controlling multicorrelations in quantum matter

  • 期刊论文

  • 发表日期：

    2026年2月6日

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  • Chuankun Huang,
  • Martin Mootz,
  • Liang Luo,
  • Ilias E. Perakis,
  • Jigang Wang

摘要

Terahertz 2D coherent spectroscopy (THz-2DCS) is an emerging technique that brings multidimensional resolution to the ultrafast spectral–temporal dynamics of non-equilibrium quantum phases of matter, enabling new capabilities for precise coherent control in many-body dynamics and multiorder correlations. By mapping and disentangling complex excitation and detection pathways across distinct time and frequency dimensions, THz-2DCS provides a form of coherence tomography of light-induced quantum matter — revealing multiquantum coherences, separating nonlinear response functions and capturing collective modes and quantum kinetics on ultrafast THz timescales. This Perspective discusses the technical capabilities of THz-2DCS, provides a comparison to other multidimensional and coherent transient spectroscopies and looks ahead towards opportunities for advancing THz-2DCS instrumentation and experimental strategies towards new frontier discoveries.