FisMat2017 - Submission - View

Abstract's title: SUNDYN: A novel setup for optical pump/X-ray probe spectroscopy at the ALOISA beamline
Submitting author: Roberto Costantini
Affiliation: CNR-IOM / Università degli Studi di Trieste (Dipartimento di Fisica)
Affiliation Address: CNR-IOM: Strada Statale 14 km 163,5 - 34149 Trieste Università degli Studi di Trieste: Via Valerio, 2 - 34127 TRIESTE
Country: Italy
Oral presentation/Poster (Author's request): Poster
Other authors and affiliations: Martina Dell'Angela (CNR-IOM), Albano Cossaro (CNR-IOM), Alberto Verdini (CNR-IOM), Paolo Sigalotti (Elettra Sincrotrone), Alberto Morgante (CNR-IOM)

Pump-probe spectroscopies at synchrotron facilities represent a valuable tool for investigating pico- to nanosecond charge dynamics at organo-metallic interfaces, which play a crucial role in organic electronics. We present here our novel experimental apparatus for time-resolved photoemission (tr-XPS) and X-ray absorption (tr-XAS) spectroscopies installed at the ANCHOR branch line (ALOISA beamline) of the Elettra synchrotron. The pump pulses are generated by a 1030 nm femtosecond fiber laser (Tangerine HP, Amplitude Systèmes). It can be operated at a repetition rate that ranges from 175 kHz to 2 MHz, and the insertion of non-linear crystals is used to change the wavelength discretely to 515, 343, 257 and 206 nm. The laser is synchronized with the Elettra storage ring and the measurements are performed by using as a probe only the ~60 ps pulses allocated in the dark gap of the bunch train when Elettra runs in the hybrid filling mode. We will present the first tr-XPS measurements obtained during the commissioning phase. As a future development, the installation of an Optical Parametric Amplifier (OPA) will allow us to tune the wavelength continuously in the 210-2000 nm range, which covers a wide range of HOMO-LUMO transitions in organic compounds.