Available superconducting magnets:
■ 16 T magnet for experiments in Faraday configuration,
■ 10 T magnet for experiments in Faraday or Voigt configuration,
■ 3T two-coil vector-rotate magnet allowing smooth transition from Faraday to Voigt geometry or in-plane rotation of the magnetic field in the Voigt geometry.

Each magnet is equipped with variable-temperature insert (VTI) allowing measurements from room temperature down to pumped helium (about 1.5 K). Persistent switches at superconducting coils, allow for extended stay at a single field in addition to regular field-sweep measurements.

Available techniques:
■ Reflectivity and transmission,
■ Raman scattering,
■ Photoluminescence (PL, PLE)
with variety of lasers: 325 nm, 405 nm, 425 nm, 457 nm, 488 nm, 515 nm, 532 nm, 561 nm, 575-625 nm (tunable), 647 nm, 685 nm, 700-860 nm (tunable), 808 nm.
Typical signal detection using Si CCD camera (400-1000 nm). InGaAs detector (up to 1700 nm) available upon request.
■ Time-resolved PL:
□ Excitation using femtosecond laser near 400 nm, or between 600 and 950 nm (tunable),
□ Detection using streak camera (S1 or S20 cathode, temporal resolution down to 3 ps), or
□ Detection using APD (quantum efficiency higher than streak camera, temporal resolution down to 50 ps).
■ Photon correlations using Si APDs,
■ Ultrafast pump-probe spectroscopy (details upon request).

Samples:
■ By default the investigated samples are probed locally using NA>0.5 lens or objective, which corresponds to the spot of 1-2 µm,
■ The samples should not be larger than about 8 mm x 8 mm,
■ Voltage control for gated samples is available.

Contact:
For more information contact:
■ dr Tomasz Kazimierczuk (Tomasz.Kazimierczuk@fuw.edu.pl) or
■ dr Maciej Molas (Maciej.Molas@fuw.edu.pl)

Available superconducting magnets:
■ Oxford Instruments cryostat with a variable temperature insert (1.5 K – 300 K) and magnetic field of (12 T),
■ Dilution fridge unit Oxford Instruments Kelvinox with temperature range (20 mK - 1 K) and magnetic field of 16 T.

In both setups probes with rotators may be used, enabling variation of sample plane with respect to magnetic field.

Available techniques:
■ Hall effect measurements for metallic to semiconducting samples,
■ Low current measurements (down to pA) may be performed.

Contact:
For more information contact:
■ dr hab. Marta Borysiewicz (Marta.Gryglas@fuw.edu.pl)