Application dielectric loss spectra

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. 

From many perspectives, liquid crystals are particularly suited for applications in this regime. First, they are nonabsorptive and possess large dielectric anisotropy (A8=8g-8o l) over the entire near-UV to infrared spectrum and beyond (400 mn-20 pm cf. Chapter 3). Secondly, the scattering loss a in this regime is an order of magnitude smaller than in the visible region, since the principal mechanism for scattering loss are director axis fluctuations [a 1/A," ( >2)]. 

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