The FEMTOARPES setup is conceived to perform Angle Resolved Photo-Emission Spectroscopy (ARPES) with femto-second time resolution. The setup is composed of a sample placed on a manipulator inside an ultra high vacuum chamber (<10-10 mbar). The sample is irradiated by 2 pulsed laser beams (pump-probe technique) and placed in front of a emispherical electron analyser

 Full characterization and optimization of a femtosecond ultraviolet laser source for time and angle-resolved photoemission on solid surfaces; J. Faure, J. Mauchain, E. Papalazarou, W. Yan, J. Pinon, M. Marsi, and L. Perfetti, Rev. Sci. Instrum. 83, 043109 (2012).

FEMTOARPES Project

The setup is composed by the following instruments:

Infrared Laser source CARBIDE 40 Watt of LIGHT CONVERSION

• Wavelength 1030 nm
• Pulse duration 259 fs
• Repetition rate 1-1000 kHz
• Energy per pulse: 400 microJoules (à 100 kHz)
• Average power: 40 W

Optical Parametric Amplifier ORPHEUS-F

• Wavelength Signal 650-900 nm
• Wavelength Idler 1200-2500 nm
• Pulse duration 50 fs
• Repetition rate 300 kHz
• Average Power 1 W at 800 nm

4th Harmonic Generation

• Wavelength 195 nm
• Pulse duration 100 fs
• Repetition rate 30-300 kHz
• Energy per pulse: 40 picoJoules
• Average power: 1E13 photons/seconde

The photoemission

We have an hemispherical analyser PHOIBOS 150 of SPECS. This instrument record Angle Resolved Photoelectron Spectroscopy (ARPES) with a angular resolution <0.15° and energy resolution < 10 meV. The electrostatic lenses allow us to to change the angular acceptance (from ±3° to ±14°) and the kinetic energy range.  A 5 axis manipulator  (x-y-z-theta-phi), fully mothorized, controls the orientation and position of the sample. This device can also set the sample temperature to any value between  40 K and 600 K.