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arxiv: 1405.5964 · v1 · pith:7CUBITTYnew · submitted 2014-05-23 · ⚛️ physics.optics · cond-mat.mtrl-sci

Extreme Ultraviolet Transient Grating Spectroscopy of Vanadium Dioxide

Emily Sistrunk (1) , Jakob Grilj (1 , 2) , Jaewoo Jeong (3) , Mahesh G. Samant (3) , Alexander X. Gray (4 , 5) Hermann A. D\"urr (4) , Stuart S. P. Parkin (3)
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Markus G\"uhr (1) ((1) Stanford PULSE Institute SLAC National Accelerator Laboratory Menlo Park USA (2) Laboratory of Ultrafast Spectroscopy Ecole Polytechnique Federal de Lausanne Switzerland (3) IBM Almaden Research Center San Jose USA (4) Stanford Institute for Materials Energy Sciences USA (5) Department of Physics Temple University Philadelphia USA)
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classification ⚛️ physics.optics cond-mat.mtrl-sci
keywords probingspectroscopycore-valenceextremegratingopticallytransientultraviolet
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Nonlinear spectroscopy in the extreme ultraviolet (EUV) and soft x-ray spectral range offers the opportunity for element selective probing of ultrafast dynamics using core-valence transitions (Mukamel et al., Acc. Chem. Res. 42, 553 (2009)). We demonstrate a step on this path showing core-valence sensitivity in transient grating spectroscopy with EUV probing. We study the optically induced insulator-to-metal transition (IMT) of a VO2 film with EUV diffraction from the optically excited sample. The VO2 exhibits a change in the 3p-3d resonance of V accompanied by an acoustic response. Due to the broadband probing we are able to separate the two features.

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