Ultrafast spectroscopy is undertaken on equipment in our femtosecond facility.

Experimental setups

We have a number of fixed experimental setups and a number of adaptable areas, allowing flexible experiments to be created that combine features from different pieces of equipment in the lab. Currently the lab has the following experiments running:

CDP FOG 100 - Optical gating allows luminescence to be detected on the femtosecond timescale. By sum-frequency mixing of the gating pulse and sample luminescence, upconverted light is produced that is detected. This technique allows temporal luminescence kintetics with time constants as low as 50 fs to be resolved.

Homebuilt Transient Absorption - Utilising two beams, a pump and a probe, with one of them delayable, allows transient kinetics in the absorption of samples to be recorded on the femtosecond timescale.

Equipment

The lab is comprised of the following apparatus:

Light Sources:
     Spectra Physics MaiTai Ti:Sapphire oscillator - 80 MHz output, 750-850 nm 100 fs (FWHM) pulse width.
     Spectra Physics Merlin laser - 527 nm, 50 kHz, 200 ns pulse width.

Light Amplifiers:
     Spectra Physics Hurricane - 5 kHz 1 W output, 800 nm, 100 fs pulses.

A forest of optics represents a side-on view of the FOG 100 optical gating setup