title: Broadband extreme ultraviolet probing of transient gratings in vanadium dioxide.
abstract: 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 VO(2) film with EUV diffraction from the optically excited sample. The VO(2) 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.
authors.forename: Emily
authors.initials: E
authors.lastname: Sistrunk
authors.forename: Jakob
authors.initials: J
authors.lastname: Grilj
authors.forename: Jaewoo
authors.initials: J
authors.lastname: Jeong
authors.forename: Mahesh G
authors.initials: MG
authors.lastname: Samant
authors.forename: Alexander X
authors.initials: AX
authors.lastname: Gray
authors.forename: Hermann A
authors.initials: HA
authors.lastname: Dürr
authors.forename: Stuart S P
authors.initials: SS
authors.lastname: Parkin
authors.forename: Markus
authors.initials: M
authors.lastname: Gühr