Relaxation processes of hot holes in germanium and GaAs studied by picosecond infrared spectroscopy

2007 ◽  
pp. 131-144
Author(s):  
Thomas Elsaesser ◽  
Andrea Lohner ◽  
Michael Woerner
Keyword(s):  
Infrared Spectroscopy ◽  
Relaxation Processes

Relaxation processes of hot holes in Ge and GaAs investigated by ultrafast infrared spectroscopy

1994 ◽  
Vol 9 (5S) ◽  
pp. 689-693 ◽  
Author(s):  
T Elsaesser ◽  
M Woerner ◽  
M T Portella ◽  
W Frey ◽  
C Ludwig ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Relaxation Processes ◽  
Ultrafast Infrared

Relaxation processes of hot holes inp-type germanium studied by picosecond infrared spectroscopy

1992 ◽  
Vol 45 (15) ◽  
pp. 8378-8387 ◽  
Author(s):  
M. Woerner ◽  
T. Elsaesser ◽  
W. Kaiser
Keyword(s):  
Infrared Spectroscopy ◽  
Relaxation Processes

In situ Study of Photoinduced Orientation in Azopolymers by Time-Dependent Polarization Modulation Infrared Spectroscopy

1996 ◽  
Vol 50 (7) ◽  
pp. 948-955 ◽  
Author(s):  
Thierry Buffeteau ◽  
Michel Pézolet
Keyword(s):  
Infrared Spectroscopy ◽  
Visible Light ◽  
Time Dependence ◽  
Rate Constants ◽  
Main Chain ◽  
Polarization Modulation ◽  
Relaxation Processes ◽  
Side Chains ◽  
Orientation Function

Infrared spectroscopy has been coupled with the polarization modulation technique in order to characterize the molecular orientation in films of azopolymers irradiated in situ with polarized visible light. The results obtained on disperse red 1-containing amorphous azopolymer (pDR1A) demonstrate the high efficiency of polarization modulation infrared linear dichroism to determine quantitatively the time dependence of the orientation function of several chemical groups during the orientation (laser on) and relaxation (laser off) processes. The difference dichroic spectra show that polarized visible light induces a preferential orientation of the azobenzene groups perpendicular to the direction of the polarization of the writing laser. This orientation of the side chains also results in a slight cooperative orientation of the C=O ester groups of the main chain of the polymer. The time dependence of the orientation function shows that the orientation and relaxation processes could be described by a biexponential function involving “fast” and “slow” response modes. The rate constants associated with these modes are the same for the main chain and the side chains of the polymer. Finally, we have observed that the level of orientation and the rate constants of the orientation and relaxation processes depend strongly on the film thickness.

Millimetre-wave and infrared spectroscopy of Br13 CN: anharmonic force field of cyanogen bromide from spectroscopic data and ab initio calculations

1997 ◽  
Vol 90 (3) ◽  
pp. 495-497
Author(s):  
CLAUDIO ESPOSTI ◽  
FILIPPO TAMASSIA ◽  
CRISTINA PUZZARINI ◽  
RICCARDO TARRONI ◽  
ZDENEK ZELINGER
Keyword(s):  
Infrared Spectroscopy ◽  
Force Field ◽  
Ab Initio Calculations ◽  
Ab Initio ◽  
Spectroscopic Data ◽  
Cyanogen Bromide ◽  
Millimetre Wave ◽  
Anharmonic Force

A long-term chemical and infrared spectroscopy study on a soil amended with municipal sewage sludge

Agronomie ◽  
2001 ◽  
Vol 21 (2) ◽  
pp. 169-178 ◽  
Author(s):  
Giovanni Gigliotti ◽  
Pier Lodovico Giusquiani ◽  
Daniela Businelli
Keyword(s):  
Infrared Spectroscopy ◽  
Sewage Sludge ◽  
Municipal Sewage ◽  
Municipal Sewage Sludge ◽  
Spectroscopy Study

Far-Infrared Spectroscopy of Diffuse Interstellar Medium - Large Silicon Abundance and Effects of UV Radiation

2002 ◽  
Vol 4 ◽  
pp. 303-303
Author(s):  
T. Onaka ◽  
Y. Okada ◽  
M. Mizutani ◽  
Y. Doi ◽  
H. Shibai
Keyword(s):  
Infrared Spectroscopy ◽  
Interstellar Medium ◽  
Uv Radiation ◽  
Far Infrared ◽  
Far Infrared Spectroscopy
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