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DTSTART;TZID=US/Eastern:20130919T160000
DTEND;TZID=US/Eastern:20130919T170000
SUMMARY:Ultrashort pulse propagation and ionization in dielectrics -- Prof. Jeremy Gulley
DESCRIPTION:Departmental Colloquium. The numerous applications of femtosecond lasers during the last 15 years has necessitated a detailed understanding of pulse propagation coupled with ultrafast laser-material interactions. Current ultrashort pulse propagation models describe the evolution of fields with broad spectra while models of laser-induced ionization and laser-plasma interactions typically assume monochromatic laser fields. In this seminar I address the inherent contradiction of combining multi- chromatic propagation models with monochromatic laser-material descriptions. Recently published experimental and simulation results are presented that show how this contradiction leads to order-of- magnitude errors in calculating the ionization yield. Further simulation results suggest that multi-chromatic effects will alter the shape and severity of laser-induced modifications to the bulk of dielectric solids.
LOCATION:Physics Auditorium (202)
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