Professor Ian Walmsley CBE FRS FCGI: Publications

Characterization of ultrashort electromagnetic pulses

ADVANCES IN OPTICS AND PHOTONICS 1:2 (2009) 308-437

Authors:

Ian A Walmsley, Christophe Dorrer

Demonstrating coherent control in ⁸⁵Rb₂ using ultrafast laser pulses: A theoretical outline of two experiments

PHYSICAL REVIEW A 80:3 (2009) ARTN 033403

Authors:

Hugo EL Martay, David J McCabe, Duncan G England, Melissa E Friedman, Jovana Petrovic, Ian A Walmsley

Direct observation of quantum-path interferences in high order harmonic generation

The European Physical Journal - Special Topics Springer Berlin / Heidelberg 175 (2009) 191-194-191-194

Authors:

E Cormier, A Zaïr, M Holler, F Schapper, U Keller, A Wyatt, A Monmayrant, I Walmsley, T Auguste, P Salières

Abstract:

Intensity dependent high harmonic generation was investigated when both short and long trajectories contribute to the emission. We have directly observed for the first time clear indication of quantum-path interference through harmonic spectrum modulations.

High precision self-referenced phase retrieval of complex pulses with multiple-shearing spectral interferometry

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS 26:9 (2009) 1818-1830

Authors:

Dane R Austin, Tobias Witting, Ian A Walmsley

Ionization effects on spectral signatures of quantum-path interference in high-harmonic generation

Opt. Express OSA 17 (2009) 7

Authors:

M Holler, A Zaïr, F Schapper, T Auguste, E Cormier, A Wyatt, A Monmayrant, IA Walmsley, L Gallmann, P Salières, U Keller

Abstract:

The interference between the emission originating from the short and long electron quantum paths is intrinsic to the high harmonic generation process. We investigate the universal properties of these quantum-path interferences in various generation media and discuss how ionization effects influence the observed interference structures. Our comparison of quantum-path interferences observed in xenon, argon, and neon demonstrates that our experimental tools are generally applicable and should also allow investigating more complex systems such as molecules or clusters.

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