Attosecond Spectroscopy
Synopsis
Attosecond pulses are produced by nonlinear-optical high-harmonic generation of focused few-cycle phase-stabilized femtosecond laser light in a rare gas target. These pulses are used to illuminate the quantum dynamics and correlated motion of electrons in various systems, including atoms, molecules, clusters and nanoparticles.
See also: Leone group, attosecond dynamics in atoms/molecules and semiconductors
Molecules studied:
atoms (He, Kr, Xe), diatomics (N2, IBr, O2), fundamental organic systems (alkyl bromides and iodides), and solid materials (Si, Ge)
Information obtained:
Time-resolved wavefunctions of electrons
Project members:
Nicolette Puskar
Patrick Rupprecht
Recent publications:
"Femtosecond symmetry breaking and coherent relaxation of methane cations via x-ray spectroscopy" E. Ridente, D. Hait, E. A. Haugen, A. D. Ross, D. M. Neumark, M. Head-Gordon, S. R. Leone Science, 380, 713–717 (2023). pdf
"Measuring autoionization decay lifetimes of optically forbidden inner valence excited states in neon atoms with attosecond noncollinear four-wave-mixing spectroscopy" N. G. Puskar, Y. C. Lin, J. D. Gaynor, M. C. Schuchter, S. Chattopadhyay, C. Marante, A. P. Fidler, C. L. Keenan, L. Argenti, D. M. Neumark, S. R. Leone, Physical Review A, 107, 033117 (2023). pdf
"Nonresonant coherent amplitude transfer in attosecond four-wave-mixing spectroscopy" J. D. Gaynor, A. P. Fidler, Y. Kobayashi, Y. C. Lin, C. L. Keenan, D. M. Neumark, S. R. Leone, Physical Review A, 107, 023526 (2023). pdf
"State-selective probing of CO2 autoionizing inner valence Rydberg states with attosecond extreme ultraviolet four-wave-mixing spectroscopy" A. P. Fidler, Y. C. Lin, J. D. Gaynor, C. W. McCurdy, S. R. Leone, R. R. Lucchese, D. M. Neumark Phys. Rev. A 106, 063525 (2022). pdf
"Conical intersection and coherent vibrational dynamics in alkyl iodides captured by attosecond transient absorption spectroscopy" K. F. Chang, H. Wang, S. M. Poullain, J. Gonzalez-Vasque L. Banares, D. Prendergast, D. M. Neumark, S. R. Leone J. Chem. Phys 156, 114304 (2022). pdf
Additional information: