Laser induced fluorescence spectroscopy
Laser induced fluorescence (LIF) is an active optical spectroscopy method which is commonly used to determine the ground state density of atoms, molecules or ions directly. The principle of this technique is based on using tunable narrow-band laser radiation which excites the studied particles from their ground state to an excited state. The fluorescence radiation which is emitted subsequently is observed.
LIF spectroscopy offers the possibility to detect distinct reactive species quantitatively if the excitation scheme is known. This method is conducted at out institute in order to analyse the plasma-produced density of different reactive species, such as nitric oxide or hydroxyl radicals, within the plasma volume and its surroundings.