A cavity ring-down spectrometer designed to study optical properties of size-selected clusters on surfaces under ultrahigh vacuum (UHV) conditions is presented. Clusters are produced using a laser vaporization cluster source with typical size-selected cluster currents of ∼100 pA. The size of the deposition area can be controlled by a focusing octopole. Using the UHV compatible mirror exchanger, it is possible to have up to ten ring-down cavities and to adjust them while in vacuum. With ten cavities it is possible to cover a continuous spectral range as broad as 600 nm. The sensitivity of the method is ∼5 ppm, which is two orders of magnitude better than com. techniques. The optical spectra of small NiN clusters (     «

A cavity ring-down spectrometer designed to study optical properties of size-selected clusters on surfaces under ultrahigh vacuum (UHV) conditions is presented. Clusters are produced using a laser vaporization cluster source with typical size-selected cluster currents of ∼100 pA. The size of the deposition area can be controlled by a focusing octopole. Using the UHV compatible mirror exchanger, it is possible to have up to ten ring-down cavities and to adjust them while in vacuum. With ten cav...     »

Cavity resonators Surface defects UV and visible spectra (cavity ring-down spectrometer for measuring the optical response of supported size-selected clusters and surface defects in ultrahigh vacuum) Spectrometers (cavity ring-down cavity ring-down spectrometer for measuring the optical response of supported size-selected clusters and surface defects in ultrahigh vacuum) Clusters (metal cavity ring-down spectrometer for measuring the optical response of supported size-selected clusters and surface defects in ultrahigh vacuum) Vacuum (ultrahigh cavity ring-down spectrometer for measuring the optical response of supported size-selected clusters and surface defects in ultrahigh vacuum) cavity ring down spectrometer metal cluster ultrahigh vacuum     «

Cavity resonators Surface defects UV and visible spectra (cavity ring-down spectrometer for measuring the optical response of supported size-selected clusters and surface defects in ultrahigh vacuum) Spectrometers (cavity ring-down cavity ring-down spectrometer for measuring the optical response of supported size-selected clusters and surface defects in ultrahigh vacuum) Clusters (metal cavity ring-down spectrometer for measuring the optical response of supported size-selected clusters and surfa...     »