High-order harmonic generation from ions in a capillary discharge

Rocca, Jorge J., author; Kapteyn, Henry C., author; Murnane, Margaret M., author; Walker, Barry C., author; Cohen, Oren, author; Berrill, Mark, author; Grisham, Michael, author; Popmintchev, Tenio, author; Reagan, Brendan, author; Gaudiosi, Dsvid M., author; American Physical Society, publisher

High-order harmonic generation from ions in a capillary discharge

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ECEjjr00058.pdf (190.16 KB)

Date

2006

Authors

Rocca, Jorge J., author

Kapteyn, Henry C., author

Murnane, Margaret M., author

Walker, Barry C., author

Cohen, Oren, author

Berrill, Mark, author

Grisham, Michael, author

Popmintchev, Tenio, author

Reagan, Brendan, author

Gaudiosi, Dsvid M., author

Abstract

We demonstrate a significant extension of the high-order harmonic cutoff by using a fully-ionized capillary discharge plasma as the generation medium. The preionized plasma dramatically reduces ionization-induced defocusing and energy loss of the driving laser due to ionization. This allows for significantly higher photon energies, up to 150 eV, to be generated from xenon ions, compared with the70 eV observed previously. We also demonstrate enhancement of the harmonic flux of nearly 2 orders of magnitude at photon energies around 90 eV when the capillary discharge is used to ionize xenon, compared with harmonic generation in a hollow waveguide. The use of a plasma as a medium for high-order harmonic generation shows great promise for extending efficient harmonic generation to much shorter wavelengths using ions.

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http://hdl.handle.net/10217/67515

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High-order harmonic generation from ions in a capillary discharge

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