Coulomb correlation and band gap renormalization at high carrier densities in quantum wires
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The optical gain spectra of strongly excited multiple GaAs-(Ga,Al)As quantum wells have been determined using the variable stripe length method. The gain spectra are obtained by analysing the dependence of the amplified luminescence intensities on stripe l ...
This paper describes a 1 to 3.5 kWe hermetic scroll expander generator modified from a standard hermetic compressor, an organic Rankine cycle test facility built to test expanders up to 10 kWe and a set of experimental results using HFC 134a in the dry vap ...
We report on an investigation of the electron-hole (e-h) plasma decay time tau(tot) versus e-h pair density in semiconductor quantum wells. We determine the density reached in a steady-state photoluminescence experiment from the optical spectra and compare ...
The mechanisms of carrier transfer from barrier regions (superlattices, side-wall and vertical quantum wells) into arrays of quantum wires are investigated by time-resolved photoluminescence. The wires are grown by different techniques on V-groove substrat ...
We show that the two-dimensional quantum confined Stark effect in a semiconductor quantum wire can display novel behaviour, i.e. wave function splitting and cascading. No analog to these phenomena can be found in bulk material or quantum wells. The consequ ...
Electronic states bound to impurities located in the quantum well barriers are calculated when the bulk binding energy is comparable to the quantum well depth. We show the existence of a complex level pattern due to the interaction between barrierlike stat ...
We present a study of the electronic properties of In(x)Ga1-xAs/GaAs quantum wells when grown on vicinal substrates, based on photoluminescence (PL) and PL excitation experiments under high magnetic field. The samples measured have a wide range of In conte ...
We have calculated the effect of alloy interdiffusion on the one-dimensional energy confinement of (Al,Ga)As/GaAs crescent shaped quantum wire structures. We show that the energy splitting between excited states may be greatly enhanced by the interdiffusio ...
The effect of exptl. parameters on the sensitivity of 2-dimensional NMR expts. was analyzed. A set of recommendations is provided for maximizing the sensitivity of a given expt. in terms of parameters such as sampling rates, acquisition times, and weightin ...
Multiple quantum NMR allows straightforward identification of networks of scalar coupled spins. The information obtained is particularly useful for the identification of magnetic equivalence when multiplet splittings are not fully resolved. The interpretat ...