Surface plasmon spectrometer

Indeed, it has been demonstrated 88) that Cs suboxides are of essential importance in the famous infrared sensitive SI photocathode 89). These cathodes contain a thin layer of oxidized Cs on a silver substrate. It is evident from UPS measurements on such a cathode prepared in a PE spectrometer that the Cs—0 layer is essentially composed of Csj 1O3, or a higher oxidized, but still metallic suboxide, giving rise to the characteristic spectrum of the bulk material, although the layer has only the thickness of a few atoms. 88) The high yield of photoelectrons in the near infrared with the SI photocathode results from two effects CS11O3 is characterized by a sufficiently small work function (emit photoelectrons when irradiated with infrared light. Furthermore, the energy necessary to create surface plasmons... 

To monitor their surface plasmon absorption, UV-visible absorption spectra were obtained for all LbL films produced using a Cary 50 UV-visible spectrometer. Atomic force microscopy (AFM) measurements were performed on a Digital Instruments NanoScope IV operating in tapping mode with a n+-... 

Clean surfaces can be probed with electrons to determine vibrational, electronic and structural properties. Diffraction with electrons is well known practical low-energy electron diffraction is performed with display analysers in the 50- 500 eV range. Bulk electronic excitations such as plasmons are usually observed in the 10- 50 eV range. While some HREELS spectrometers are capable of 200 eV primary beams for this kind of measurement, plasmons are more often investigated with analyser types designed for higher energy, such as those used for... 

Contents Introduction. - Volume Plasmons. - The Dielectric Function and the Loss Function of Bound Electrons. -Excitation of Volume Plasmons. - The Energy Loss Spectrum of Electrons and the Loss Function. - Experimental Results. - The Loss Width. - The Wave Vector Dependency of the Energy of the Volume Plasmon. - Core Excitations. -Application to Microanalysis. - Energy Losses by Excitation of Cerenkov Radiation and Guided Light Modes. - Surface Excitations. - Different Electron Energy Loss Spectrometers. - Notes Added in Proof - References. - Subject Index. 

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