Terahertz setup

Specifications

Seed for generating and detecting terahertz (THz) pulses

• Wavelength: 800 nm
• Pulse energy: 180 μJ
• Repetition rate: 1 kHz
• Pulse duration: 150 fs

THz pulse characteristics

• Duration: approx. 2 ps
• Spectral content: 0.2 – 2.5 THz

Available excitation sources

• Fundamental 800 nm beam: 600 μJ/pulse
• Second harmonic, 400 nm, up to 100 μJ/pulse
• Third harmonic, 266 nm, up to 15 μJ/pulse
• Parametric amplifier TOPAS, tunable from 2500 nm down to 240 nm, pulse energy depends on the wavelength (typically 1 – 80 μJ/pulse)
• Refer to the Millenia pump-probe setup for more details.

Further features

• The THz setup is enclosed in a box which can be purged with dry nitrogen to prevent water-vapor absorption of the THz beam.
• The excitation beam and the THz beam hit the sample at the same angle.
• Ellipsoidal mirrors are used to focus the THz radiation.

Left panel: Characteristic temporal profile of a THz pulse measured in our laboratory. Right panel: Spectrum of the THz pulse.

Photo of our THz setup.

Schematic diagram of the experimental setup for terahertz experiments. Please visit the site of time-resolved THz spectroscopy technique to see how the setup works.