Phase matching of high order harmonic generation using dynamic phase modulation caused by a non-collinear modulation pulse

Patent · Tue Feb 16 00:00:00 EST 2010

OSTI ID:1014195

Cohen, Oren ^[1]; Kapteyn, Henry C ^[1]; Mumane, Margaret M ^[1]

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1. Boulder, CO

Phase matching high harmonic generation (HHG) uses a single, long duration non-collinear modulating pulse intersecting the driving pulse. A femtosecond driving pulse is focused into an HHG medium (such as a noble gas) to cause high-harmonic generation (HHG), for example in the X-ray region of the spectrum, via electrons separating from and recombining with gas atoms. A non-collinear pulse intersects the driving pulse within the gas, and modulates the field seen by the electrons while separated from their atoms. The modulating pulse is low power and long duration, and its frequency and amplitude is chosen to improve HHG phase matching by increasing the areas of constructive interference between the driving pulse and the HHG, relative to the areas of destructive interference.

• Research Organization: Rugents of the University of Colorado a body corporate (Denver, CO)
• Sponsoring Organization: USDOE
• DOE Contract Number: FG52-06NA26151
• Assignee: Rugents of the University of Colorado a body corporate (Denver, CO)
• Patent Number(s): 7,664,147
• Application Number: US Patent Application 12/002,523
• OSTI ID: 1014195
• Country of Publication: United States
• Language: English