Role of two- and three-ion energy transfer processes in three-micrometer generation of erbium doped crystals

1996 ◽  
Author(s):  
Serban Georgescu ◽  
Marius Micluta
Keyword(s):  
Energy Transfer ◽  
Ion Energy ◽  
Transfer Processes ◽  
Erbium Doped

Role of Ions in Bias Enhanced Nucleation of Diamond

1995 ◽  
Vol 388 ◽  
Author(s):  
J.M. Lannon ◽  
J.S. Gold ◽  
Cd. Stinespring
Keyword(s):  
Thin Films ◽  
Silicon Carbide ◽  
Surface Composition ◽  
Hydrogen Ions ◽  
Ion Energy ◽  
Transfer Processes ◽  
Ion Interactions ◽  
Ion Energies

AbstractIon-surface interactions are thought to play a role in bias enhanced nucleation of diamond. To explore this hypothesis and understand the mechanisms, surface studies of hydrogen and hydrocarbon ion interactions with silicon and silicon carbide have been performed. the experiments were carried out at room temperature and used in-situ auger analyses to monitor the surface composition of thin films produced or modified by the ions. Ion energies ranged from 10 to 2000 eV. Hydrogen ions were found to modify silicon carbide thin films by removing silicon and converting the resulting carbon-rich layers to a mixture of sp2- and sp3-C. the interaction of hydrocarbon ions with silicon was shown to produce a thin film containing SiC-, sp2-, and sp3-C species. IN general, the relative amount of each species formed was dependent upon ion energy, fluence, and mass. the results of these studies, interpreted in terms of chemical and energy transfer processes, provide key insights into the mechanisms of bias enhanced nucleation.

Nanostructured Organic Thin Films: Electronic Energetics and Devices

2001 ◽  
Vol 15 (28n30) ◽  
pp. 3722-3726 ◽  
Author(s):  
C. TALIANI ◽  
F. BISCARINI ◽  
E. LUNEDEI ◽  
P. Mei ◽  
M. Muccini ◽  
...  
Keyword(s):  
Thin Films ◽  
Energy Transfer ◽  
Vibrational Spectroscopy ◽  
Crystal Packing ◽  
Organic Thin Films ◽  
Model Systems ◽  
Conjugation Length ◽  
Time Dynamics ◽  
Transfer Processes

We report on the optoelectronic properties of vacuum sublimed organic thin films of the oligothienyls ( Tn ) model systems. The Davydov splitting (DS) of the lowest exciton is about 0.3 eV and decreases with the conjugation length when going from T 4 to T 6. The lowest DS component is partially forbidden due to the crystal packing and the spectral activity occurs via Herzberg-Teller (HT) vibronic coupling. We show the real time dynamics of the HT coupling by coherent vibrational spectroscopy and the role of aggregates in the energy transfer processes within the films.

scholarly journals Role of Auger-Type Energy Transfer Processes in Quenching of Anti-Stokes Emission in Chromium and Iron Doped ZnSe: ODMR, Optical and Time-Resolved Study

2003 ◽  
Vol 103 (6) ◽  
pp. 695-701 ◽  
Author(s):  
V.Yu. Ivanov ◽  
G. Karczewski ◽  
M. Godlewski ◽  
A.M. Omel'chuk ◽  
A.E. Belyaev ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Time Resolved ◽  
Transfer Processes ◽  
Iron Doped ◽  
Anti Stokes

Role of internal mechanisms in energy transfer processes in organic liquid scintillators

1997 ◽  
Vol 48 (3) ◽  
pp. 359-364 ◽  
Author(s):  
G.H. Malimath ◽  
G.C. Chikkur ◽  
H. Pal ◽  
T. Mukherjee
Keyword(s):  
Energy Transfer ◽  
Organic Liquid ◽  
Transfer Processes
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