[MOS] MOS May 3, 2005

[Zina Queen]

Seminar on
Modern Optics and Spectroscopy
Hrvoje Petek, University of Pittsburgh

Ultrafast imaging and control of plasma waves in Fermi seas

May 3, 2005
12:00 - 1:00 p.m.

Abstract

Light interacting with nanostructured metals excites collective 
charge density fluctuations known as surface plasmons (SP). Through 
excitation of localized SP eigenmodes incident light is trapped on 
nanometer spatial and femtosecond temporal scales and its field is 
enhanced. Here we demonstrate imaging and quantum control of SP 
dynamics in a nanostructured silver film.  By inducing and imaging 
the nonlinear two-photon photoemission from the sample with a pair of 
identical 10-fs laser pulses while scanning the pulse delay, we 
record a movie of SP fields with 330-attoseconds/frame. 
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