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PHYSICS COLLOQUIUM


"Gone in the blink of a field: ultrashort optical waveforms from the far IR to the deep UV"


ALEKSEI ZHELTIKOV
Texas A&M University

ABSTRACT 

Ultrashort optical waveforms tend to rapidly lose their localization in time and space because of dispersion and diffraction. The recent discoveries in ultrafast optical science suggest that both diffraction-induced beam divergence and dispersion-related pulse stretching can be managed through a unique combination of strongly coupled spatial and temporal effects in freely propagating beams and in waveguide systems. Solitonic phenomena in specifically designed solid- and hollow-core fibers will be shown to enable a synthesis of ultrashort optical waveforms with broadly tunable pulse widths, including pulses shorter than the field cycle. In freely propagating beams, a strongly coupled spatiotemporal nonlinear dynamics of ultrashort lightwaves can give rise to an assortment of extremely short field transients in an ultrabroad spectral range from the far infrared to the deep ultraviolet, yielding subfemtosecond flashes of multioctave supercontinuum, attosecond shock waves, and subcycle pulses from the deep UV to the terahertz range.


Thursday, October 25, 2012
Hawking Auditorium, 4:00 p.m.
Mitchell Physics Institute


Department of Physics and Astronomy
Texas A&M University

(Refreshments to be served at 3:45pm in the Penrose Plaza)

Host: Alexey Belyanin