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<div align="center"><font face="Times New Roman"
color="#000000"><b>Seminar on</b></font></div>
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color="#000000"><b>Modern Optics and Spectroscopy</b></font></div>
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<div align="center"><font face="Arial" color="#000000"><b>Field-free
molecular orientation</b></font></div>
<div align="center"><font face="Arial" color="#000000"><b>and
alignment</b></font></div>
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<div align="center"><font face="Times New Roman"
color="#000000"><b>Sharly Fleischer</b>, M.I.T.</font></div>
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<div align="center"><font face="Times New Roman"
color="#000000">Tuesday, October 19, 2010</font></div>
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<div align="center"><font face="Times New Roman" color="#000000">12:00
- 1:00 p.m.</font></div>
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<div align="center"><font face="Arial" color="#000000">Upon their
interaction with a short optical pulse, gas phase linear molecules
become rotationally excited. This coherent excitation leads to the<b>
alignment</b> of the molecular axes along the laser polarization axis,
observed as a periodic angular squeezing governed by
"quantum rotational revivals". A short<b> Terahertz</b>
pulse results in the<b> orientation</b> of molecular dipoles,
thereby breaking the up-down symmetry introduced by alignment. I
will present the basics of the two interactions both classically and
quantum mechanically and discuss some further coherent
manipulations they enable, such as the induction of unidirectional
rotational motion and planar rotation, and selective rotational
excitation of close molecular species.</font></div>
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<div align="center"><font face="Times New Roman" color="#000000">Grier
Room, MIT Bldg 34-401</font></div>
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color="#000000">Refreshments served after the lecture</font></div>
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