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VERSION:2.0
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METHOD:PUBLISH
BEGIN:VEVENT
DTSTAMP:20260824T134923Z
LAST-MODIFIED:20121116T203436Z
DTSTART:20120217T170000Z
DTEND:20120217T180000Z
UID:event676@bu.edu
URL:http://physics.bu.edu/internal/events/show/676
SUMMARY:Femtosecond Coherent Optical Control of Electronic and Magnetic Ord
	er
DESCRIPTION:Featuring Ilias Perakis\, University of Crete\nHosted by: Richa
	rd Averitt\n\nPart of the Biophysics/Condensed Matter Seminar Series.\n\nAb
	stract:\nThe idea of using femtosecond laser pulses to control material pro
	perties at the quantum level has led to some exciting developments at the f
	rontier of condensed-matter physics and materials science. Interactions amo
	ng coupled degrees of freedom make it possible to switch and modulate elect
	ronic and magnetic properties in new ultrafast ways by using photons. Recen
	t advances in laser technology provide access to non-equilibrium many-body 
	states and non-thermal phases. Prominent examples that challenge our presen
	t understanding are femtosecond photoinduced phase transitions and femto-ma
	gnetism. In this talk I will discuss a non-equilibrium theory that engages 
	the elements of transient coherence\, correlation\, and nonlinearity to add
	ress the following fundamental questions in different systems:\n\nWhat happ
	ens during the coherent nonlinear photoexcitation of a correlated system?\n
	What is the nonlinear optical and magneto-optical response to this photoexc
	itation?\nWhat non-equilibrium many-body mechanisms govern the non-thermal 
	temporal regime?\nWhich experimental schemes can best visualize the resulti
	ng transient phases?\n\nThis theory is tightly integrated with femtosecond 
	nonlinear optical and magneto-optical spectroscopy experiments. I will pres
	ent recent results in three model systems: ferromagnetic (III\,Mn)V semicon
	ductors\,  two- dimensional electron gas in a strong magnetic field\, 
	and the manganites. I will also discuss some possible applications for all-
	optical magnetic memory control at THz speeds. \n 
LOCATION:SCI 352\, 590 Commonwealth Avenue\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
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