Laboratory of terahertz spintronics
The Laboratory of Terahertz (THz) Spintronics was established in 2019 with the support of the grant GAČR: EXPRO. Its primary purpose is to study ultrafast spintronic phenomena in solids using time-domain THz spectroscopy. The laboratory equipment is compatible with a number of spectroscopic setups: THz emission spectroscopy allows the study of the dynamics of picosecond short electric and spin currents; THz transmission spectroscopy provides access to a frequency-resolved conductivity tensor; and an excitation-probe (pump-probe) setup is used for time-resolved measurements of the response of materials to strong THz or optical electric fields.
Laboratory equipment
The core of the laboratory is the setup for the time-domain THz spectroscopy. Key equipment includes:
- femtosecond solid-state laser Pharos, Light Conversion (10W, 1030 nm, 170 fs, max. energy in pulse 1 mJ, tunable repetition rate 10 kHz-1 MHz and 80 MHz, pulse picker)
- optical parametric amplifier Orpheus, Light Conversion (300–2800 nm wavelength tunability, pulse energy 53 μJ @ 190 kHz)
- THz pulse generation (frequency range 0.1–2.5 THz)
- delay line for pump-probe experiments (delay up to 5 ns)
- rotating static magnetic field (250 mT)
- controlled environment with dry air
In addition, the laboratory is equipped with an optical experiment with high spatial and temporal resolution (170 fs, 1 μm).
