High sensitivity transient infrared spectroscopy: a UV/Visible transient grating spectrometer with a heterodyne detected infrared probe.
We describe here a high sensitivity means of performing time resolved UV/Visible pump, infrared probe spectroscopy using optically Heterodyne Detected UV-IR Transient Gratings. The experiment design employed is simple, robust and includes a novel means of generating phase locked pulse pairs that relies on only mirrors and a beamsplitter. A signal to noise ratio increase of 24 compared with a conventional pump-probe arrangement is demonstrated.
Institute of Physical Chemistry, University of Zürich, Winterthurerstrasse 190, Zürich CH-8057, Switzerland.
Paul M
PM
Donaldson
Halina
H
Strzalka
Peter
P
Hamm