Dipanwita and Chakra

Lasers in the KLS

A graduate student in the lab

Ioannis and Pat

Student in stylish shades

     

The Attosecond Revolution

The most intuitive way to understand the extreme nonlinear interaction that leads to attosecond pulses is through the semi-classical re-collision model. A strong infrared light pulse illuminating an atom or molecule creates a "free" electron wave packet by multiphoton ionization, usually approximated by tunneling. Tunneling occurs over a range of phases of the fundamental pulse near each crest of the laser electric field - a time window of roughly 300 attoseconds (as). In practice, in the infrared, multiphoton ionization intensities in the range of 1014 to 1015 W/cm2 are needed, corresponding to peak electric field strengths of 3-10 V/Å...

This article by Paul Corkum and Zenghu Chang was the cover story in the October Optics & Photonics News. It is available in Acrobat form.

     

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This Week at JRM

Week of 22 November 2009

Mon1:30 pm Nuts & Bolts
Please Be Prompt!
Tue  
Wed Thansgiving Break
Thu Thansgiving Break
Fri Thansgiving Break
 
     
     

MURI

The MURI project now has its own website.

KSU, NRC Canada and Texas A&M collaborate in the Multidisciplinary University Research Initiative program, entitled "Attosecond Optical Technology Based on Recollision and Gating".