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Intraband transitions around 1.5 mum are studied in PbSe quantum dots at room temperature. Femtosecond pump-probe measurements reveal induced absorption by photoexcited carriers up to higher energy levels and its relaxation. A dominant decay component has ...
In this paper we performed steady-state and time-resolved near-field scanning optical spectroscopy on GaN/AlN quantum dot (QD) structures and InGaN/GaN multiple quantum wells (MQWs). The morphology of the QD sample is composed of islands in the 500-1000 nm ...
Based on the models describing the behaviour of neoclassical tearing modes (NTMs), fits for the seed-island triggered excitation and disappearance of these modes at small beta-values have been tested for an extended parameter range in the rho(pi)*-(&upsilo ...
Time-resolved measurements of endogenous tissue autofluorescence were carried out on the bronchial mucosa of 18 patients during endoscopy by the means of an optical fibre-based spectrometer. The objective was to assess the fluorescence lifetime as a new co ...
We investigate a semiconductor microcavity containing a quantum well, a sample of exceptional quality. We observe a four-wave mixing response which resembles that of an inhomogeneously broadened exciton system, while the linear transmission measurements ar ...
Time-resolved fluorescence spectra for C60 mols. embedded in Ne and Ar matrixes and C70 in Ne matrixes were recorded using a synchroscan streak camera. In the case of C60, the decay times of the S1 state are identical for all fluorescence bands confirming ...
Time resolved photoluminescence in semiconductor microcavities in the strong coupling regime both for non-resonant and resonant excitation is modeled by considering scattering of exciton polaritons by acoustic phonons. Rise time and decay time of the lumin ...
KLUWER ACADEMIC PUBL, 101 PHILIP DRIVE, NORWELL, MA 020611996
We use conventional and multispeckle dynamic light scattering to investigate the dynamics of a wide variety of jammed soft materials, including colloidal gels, concentrated emulsions, and concentrated surfactant phases. For all systems, the dynamic structu ...
The dynamic range, sensitivity and dark decay of holographic recording in LiNbO3 crystals doped with 0.2 atomic% Mn with different oxidation states have been measured. The sensitivity is 0.5 cm/J and found to be independent of the oxidation states, while t ...
The 2-K recombination dynamics of coupled GaN-AlGaN multiple quantum wells reveals a composite nature in terms of the joint contributions of short-lived direct excitons and long-lived oblique ones. The possibility to observe these oblique excitons, which p ...