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:

small molecules (N₂, SF₆), clusters (Ne_n), metal nanoparticles

Information obtained:

Time-resolved wavefunctions of electrons

Project members:

Erika Warrick

Marieke Jager

Chris Kaplan

Ashley Fidler

Yuki Kobayashi

Hung-Tzu Chang

Peter Kraus

Michael Zurch

Kristina Chang

Andrew Ross

Hugo Marroux

Recent publications:

♦ "Tracking the insulator-to-metal phase transition in VO₂ with few-femtosecond extreme UV transient absorption spectroscopy" M. F. Jager, C. Ott, P. M. Kraus, C. J. Kaplan, W. Pouse, R. E. Marvel, R. F. Haglund, D. M. Neumark, S. R. Leone, Proc. Natl. Acad. Sci. USA (2017). pdf

♦ "Direct and simultaneous observation of ultrafast electron and hole dynamics in germanium" M. Zurch, H.-T. Chang, L. J. Borja, P. M. Kraus, S. K. Cushing, A. Gandman, C. J. Kaplan, M. H. Oh, J. S. Prell, D. Prendergast, C. D. Pemmaraju, D. M. Neumark, S. R. Leone, Nature Comm., 8, 15734 (2017). pdf

♦ "Ultrafast carrier thermalization and trapping in silicon-germanium alloy probed by extreme ultraviolet transient absorption spectroscopy" M. Zurch, H.-T. Chang, P. M. Krauss, S. K. Cushing, L. J. Borja, A. Gandman, C. J. Kaplan, M. H. Oh, J. S. Prell, D. Prendergast, C. D. Pemmaraju, D. M. Neumark, S. R. Leone, Struct. Dyn. 4, 044029 (2017). pdf

♦ "Attosecond transient-absorption dynamics of xenon core-excited states in a strong driving field" Y. Kobayashi, H. Timmers, M. Sabbar, S. R. Leone, D. M. Neumark, Phys. Rev. A 95, 031401 (2017). pdf

Additional information:

http://atto.lbl.gov