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XUV-induced transient phase gratings for probing ultra-fast carrier generation and recombination processes in wide-bandgap semiconductors
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Electricity.
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2013 (English)In: Annalen der Physik, ISSN 0003-3804, E-ISSN 1521-3889, Vol. 525, no 1-2, 59-65 p.Article in journal (Refereed) Published
Abstract [en]

A method for probing the temporal evolution of ultra-fast carrier generation and recombination processes in wide-bandgap semiconductors, e.g. diamond, is described. Two extreme ultraviolet (pump) pulses produced by high-order harmonic generation in Argon gas (with a photon energy of 32 eV) are superimposed on a sample with a small angle between them, inducing periodic changes in the refractive index of the material causing it to act as a transient diffraction grating. A delayed synchronized infrared (probe) pulse gets diffracted on the induced phase grating and is detected in the first diffraction order. By varying the time-delay between pump and probe, the full temporal evolution of the free carrier generation and recombination processes can be resolved. Feasibility calculations and the first steps towards experimental implementation are presented.

Place, publisher, year, edition, pages
2013. Vol. 525, no 1-2, 59-65 p.
Keyword [en]
Electron cascade, wide-bandgap semiconductor, ultrafast carrier phenomena, XUV, pump-probe, transient phase grating, high-order harmonic generation
National Category
Engineering and Technology
Research subject
Engineering Science with specialization in Science of Electricity
URN: urn:nbn:se:uu:diva-190117DOI: 10.1002/andp.201200187ISI: 000314918500013OAI: oai:DiVA.org:uu-190117DiVA: diva2:583043
Available from: 2013-01-07 Created: 2013-01-07 Last updated: 2013-12-13Bibliographically approved

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Gabrysch, MarkusIsberg, Jan
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