BL17SU High resolution angle-resolved pes
Inquiry number
INS-0000000326
High resolution soft x-ray angle-resolved photoemission spectrometer (A2 station)
Soft X-ray photoemission experimental station equipped with the high resolution photoelectron analyzer (SES2002, Gammadata SCIENTA) is designed for the study on the electronic structure of various kinds of materials. This apparatus enables us to measure the angle-resolved photoemission spectrum using ±7° acceptance angle of photoelectron analyzer, the temperature dependence of the electronic structure down to 20 K using He cryostat as well as the polarization dependence using linearly (vertical and horizontal) and circularly polarized soft x rays.
Photoemission apparatus is connected to laser molecular beam epitaxy (laser MBE) equipment in ultra high vacuum, enabling in situ observation of the electronic states of transition-metal oxide or nitride thin films fabricated in laser MBE equipment. The time-resolved photoemission spectroscopy using femto-second laser is also ready for the experiment. A time resolution of 40 ps is obtained for 100 fs and 40 ps pulse durations of the laser and the soft X-ray pulses, respectively.
- Specifications of laser system
- Mode-locked Ti : sapphire laser
Average power 750 mW Tuning range 720 ∼ 850 nm Pulse width 100 fs Repetition rate 84.76 MHz - Regenerative amplifier
Pulse energy 1.1 mJ / pulse Wavelength 800 nm Pulse width 130 fs Repetition rate 1 kHz 
Schematic view of soft X-ray photoemission experimental station
Photograph of soft X-ray photoemission experimental station
Ti : sapphire laser (Spectra Physics) for the time-resolved photoemission spectroscopy
