Multidimensional high harmonic spectroscopy

Barry D. Bruner, Hadas Soifer, Dror Shafir, Valeria Serbinenko, Olga Smirnova, Nirit Dudovich

Research output: Contribution to journalArticlepeer-review


High harmonic generation (HHG) has opened up a new frontier in ultrafast science where attosecond time resolution and Angstrom spatial resolution are accessible in a single measurement. However, reconstructing the dynamics under study is limited by the multiple degrees of freedom involved in strong field interactions. In this paper we describe a new class of measurement schemes for resolving attosecond dynamics, integrating perturbative nonlinear optics with strong-field physics. These approaches serve as a basis for multidimensional high harmonic spectroscopy. Specifically, we show that multidimensional high harmonic spectroscopy can measure tunnel ionization dynamics with high precision, and resolves the interference between multiple ionization channels. In addition, we show how multidimensional HHG can function as a type of lock-in amplifier measurement. Similar to multi-dimensional approaches in nonlinear optical spectroscopy that have resolved correlated femtosecond dynamics, multi-dimensional high harmonic spectroscopy reveals the underlying complex dynamics behind attosecond scale phenomena.

Original languageEnglish
Article number174006
JournalJournal of Physics B: Atomic, Molecular and Optical Physics
Issue number17
StatePublished - 14 Sep 2015
Externally publishedYes


  • attosecond science
  • high harmonic generation
  • multidimensional ultrafast spectroscopy


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