Zobrazeno 1 - 10
of 131
pro vyhledávání: '"I. Rückmann"'
Publikováno v:
Journal of Crystal Growth. 318:1067-1070
We deposited tris-(8-hydroxyquinoline) aluminum (Alq3) films on glass substrates by using the hot-wall method. The Alq3 films were deposited for changing substrate temperature from 50 to 125 °C. With increasing the substrate temperature, anomalous g
Publikováno v:
Photochemical & Photobiological Sciences. 9:1152-1158
Different porphyrin conformations are believed to play a role in controlling the cofactor properties in natural tetrapyrrole-protein complexes. In order to study the correlation between macrocycle nonplanarity and physicochemical properties in detail
Publikováno v:
physica status solidi c. 6:560-563
The optical properties of ZnO nanowires are strongly influenced by surface effects. For diameters smaller than 200 nm, a surface exciton recombination band is observed. We report on the recombination dynamics of this emission band using low temperatu
Publikováno v:
physica status solidi (b). 243:2410-2413
In experiments and simulations based on a microscopic theory the optical coherent control of exciton-biexciton beats in coherent four-wave-mixing signals from a semiconductor quantum well is demonstrated. It is found that a reduction of the beat ampl
Publikováno v:
physica status solidi c. 3:2449-2452
The coherent optical control of four-wave-mixing (FWM) polaritonic polarization in a heterostructure containing a 25 nm thin active ZnSe layer is studied. For the first-order direction of diffraction 2k1-k2 the phase-locked pulse pair contributes qua
Publikováno v:
physica status solidi c. 3:1135-1138
We report coherent optical control of polariton modes in pulse-transmission and four-wave-mixing experiments realized on a ZnSe/ZnSSe heterostructure containing a 25 nm thin active ZnSe layer. It is shown in linear pulse-transmission at low excitatio
Publikováno v:
physica status solidi (b). 243:813-818
We present results of experimental work in which the coherent-control technique has been applied to study the coherent manipulation of excitonic polarization in ZnSe quantum-well samples. We will introduce the linear control of excitonic polarization
Autor:
Frank Jahnke, I. Rückmann, Jürgen Gutowski, Stefan Schumacher, M. Buck, Tobias Voss, L. Wischmeier, Gerd Czycholl
Publikováno v:
The European Physical Journal B. 42:175-180
A theory-experiment comparison for the intensity and polarization dependence of spectrally resolved transient four-wave-mixing signals is presented for a ZnSe single quantum well. Results for high intensities deviate from a simple model based on the
Publikováno v:
physica status solidi (c). 1:843-846
The decay of excitonic and biexcitonic polarization in a ZnSe single-quantum well is studied in transient, time-integrated four-wave-mixing measurements. The acoustic- and optical-phonon-scattering coefficients are obtained from the temperature depen
Publikováno v:
physica status solidi (c). :1497-1500
The optical coherent-control technique is used to study biexcitonic effects in the four-wave-mixing signal of a ZnSe single quantum well. The signal is analyzed in both directions 2k1 − k2 and 2k2 − k1 which are not equivalent if a pulse pair is