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Polarization control of high order harmonics in the EUV photon energy range

Abstract : We report the generation of circularly polarized high order harmonics in the extreme ultraviolet range (18-27 nm) from a linearly polarized infrared laser (40 fs, 0.25 TW) focused into a neon filled gas cell. To circularly polarize the initially linearly polarized harmonics we have implemented a four-reflector phase-shifter. Fully circularly polarized radiation has been obtained with an efficiency of a few percents, thus being significantly more efficient than currently demonstrated direct generation of elliptically polarized harmonics. This demonstration opens up new experimental capabilities based on high order harmonics, for example, in biology and materials science. The inherent femtosecond time resolution of high order harmonic generating table top laser sources renders these an ideal tool for the investigation of ultrafast magnetization dynamics now that the magnetic circular dichroism at the absorption M-edges of transition metals can be exploited
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Contributor : Marie-Laure Edwards Connect in order to contact the contributor
Submitted on : Monday, October 29, 2012 - 5:04:53 PM
Last modification on : Thursday, October 6, 2022 - 10:38:26 AM
Long-term archiving on: : Wednesday, January 30, 2013 - 3:41:25 AM


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Boris Vodungbo, Anna Barszczak Sardinha, Julien Gautier, Guillaume Lambert, Constance Valentin, et al.. Polarization control of high order harmonics in the EUV photon energy range. Optics Express, Optical Society of America - OSA Publishing, 2011, 19 (5), pp.4346-4356. ⟨10.1364/OE.19.004346⟩. ⟨hal-00746804⟩



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