Influence of exchange effects on the plasmon excitation spectrum of metals: Application in the case of beryllium

1991 ◽  
Vol 43 (10) ◽  
pp. 7538-7545 ◽  
Author(s):  
N. M. Glezos
Keyword(s):  
Excitation Spectrum ◽  
Plasmon Excitation ◽  
Exchange Effects

Plasmon excitation spectrum of an electron quantum wire at finite temperature

2018 ◽  
Author(s):  
Akariti Sharma ◽  
Kulveer Kaur ◽  
Vinayak Garg ◽  
R. K. Moudgil
Keyword(s):  
Excitation Spectrum ◽  
Finite Temperature ◽  
Quantum Wire ◽  
Plasmon Excitation ◽  
Electron Quantum

Exchange effects on the excitation spectrum of liquid helium

1977 ◽  
Vol 16 (5) ◽  
pp. 1969-1978 ◽  
Author(s):  
A. Isihara ◽  
T. Samulski
Keyword(s):  
Liquid Helium ◽  
Excitation Spectrum ◽  
Exchange Effects

STEM Study of Surface Plasmon Excitation in Small Spherical Particles

1990 ◽  
Vol 48 (2) ◽  
pp. 42-43
Author(s):  
Daniel UGARTE
Keyword(s):  
Energy Loss ◽  
Spherical Particles ◽  
Small Particles ◽  
Bulk Materials ◽  
Low Loss ◽  
Plasmon Excitation ◽  
Surface Modes ◽  
Surface Plasmon Excitation ◽  
Analytical Electron ◽  
Analytical Electron Microscope

Small particles exhibit chemical and physical behaviors substantially different from bulk materials. This is due to the fact that boundary conditions can induce specific constraints on the observed properties. As an example, energy loss experiments carried out in an analytical electron microscope, constitute a powerful technique to investigate the excitation of collective surface modes (plasmons), which are modified in a limited size medium. In this work a STEM VG HB501 has been used to study the low energy loss spectrum (1-40 eV) of silicon spherical particles [1], and the spatial localization of the different modes has been analyzed through digitally acquired energy filtered images. This material and its oxides have been extensively studied and are very well characterized, because of their applications in microelectronics. These particles are thus ideal objects to test the validity of theories developed up to now.Typical EELS spectra in the low loss region are shown in fig. 2 and energy filtered images for the main spectral features in fig. 3.

Investigation of cluster layers of small netal particles by TEM, SEM, EELS and by photoacoustic spectroscopy

1990 ◽  
Vol 48 (4) ◽  
pp. 250-251
Author(s):  
H. Seiler ◽  
U. Haas ◽  
K.H. Körtje
Keyword(s):  
Bulk Material ◽  
High Vacuum ◽  
Optical Methods ◽  
Metal Particles ◽  
Silver Particles ◽  
Low Loss ◽  
Plasmon Excitation ◽  
First Results ◽  
Diffraction Patterns ◽  
Small Metal Particles

The physical properties of small metal particles reveal an intermediate position between atomic and bulk material. Especially Ag has shown pronounced size effects. We compared silver layers evaporated in high vacuum with cluster layers of small silver particles, evaporated in N2 at a pressure of about 102 Pa. The investigations were performed by electron optical methods (TEM, SEM, EELS) and by Photoacoustic (PA) Spectroscopy (gas-microphone detection).The observation of cluster layers with TEM and high resolution SEM show small silver particles with diameters of about 50 nm (Fig. 1 and Figure 2, respectively). The electron diffraction patterns of homogeneous Ag layers and of cluster layers are similar, whereas the low loss EELS spectra due to plasmon excitation are quite different. Fig. 3 and Figure 4 show first results of EELS spectra of a cluster layer of small silver particles on carbon foil and of a homogeneous Ag layer, respectively.

Measurement of exchange effects in (e,2e) collisions on lithium

1999 ◽  
Vol 09 (PR6) ◽  
pp. Pr6-219-Pr6-223
Author(s):  
G. Baum ◽  
W. Blask ◽  
M. Streun
Keyword(s):  
Exchange Effects

Enhanced Photocurrent Properties of Dye/Au-Loaded TiO2 Films by Grating-Coupled Surface Plasmon Excitation

2013 ◽  
Vol E96.C (3) ◽  
pp. 385-388 ◽  
Author(s):  
Hathaithip NINSONTI ◽  
Weerasak CHOMKITICHAI ◽  
Akira BABA ◽  
Wiyong KANGWANSUPAMONKON ◽  
Sukon PHANICHPHANT ◽  
...  
Keyword(s):  
Surface Plasmon ◽  
Tio2 Films ◽  
Plasmon Excitation ◽  
Surface Plasmon Excitation
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