Atto
Department of Chemistry, University of California Berkeley
and Chemical Science Division, Lawrence Berkeley National Laboratory
Slow photoelectron velocity-map imaging spectroscopy
Fast beam translational spectroscopy
Femtosecond Time-resolved photoelectron imaging
Liquid flat jet molecular beam scattering
Spectroscopy and dynamics in helium droplets
Attosecond spectroscopy
Spectroscopy and dynamics in liquid microjets
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:
James Gaynor
Yen-Cheng Lin
Nicolette Puskar
Recent publications:
♦ "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
♦ "Theoretical analysis of the role of complex transition dipole phase in XUV transient-absorption probing of charge migration" Y. Kobayashi, D. M. Neumark, S. R. Leone Optics Express 30 5673 (2022). pdf
♦ "Solid state core-exciton dynamics in NaCl observed by tabletop attosecond four-wave mixing spectroscopy" J. Gaynor, A. P. Fidler, Y. -C. Lin, H. T. Chang, D. M. Neumark, S. R. Leone Phys. Rev. B 103, 245140 (2021). pdf
Additional information:
http://www.cchem.berkeley.edu/leonegrp/