Titlebook: Quantum Dots; Lucjan Jacak,Arkadiusz Wójs,Pawe? Hawrylak Book 1998 Springer-Verlag Berlin Heidelberg 1998 electronic structure.mechanics.q

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Intraband Optical Transitions,confined electrons, but only to their center-of-mass motion. Indirect interaction of the FIR light with the relative motion of electrons, which would allow for the observation of the effects of electron-electron interactions in the FIR experiment, requires a coupling between the relative (rel) and the center-of-mass (cm) motions.

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Introduction,conductor crystals, or beams of beta radiation. Most of these are three-dimensional systems, while an effective reduction of geometry to two or fewer dimensions — by a strong spatial localization to a plane, line, or point (i.e., confinement of an electron in at least one direction at the de Broglie

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Single-Particle States of Quantum Dots,tures, with characteristic dimensions in the range of 10–100 nm, the distance between neighboring energy levels is on the order of a few meV. As shown in Fig. 3.1, the quantization of energy, or alternatively, the reduction of the dimensionality of the system, is directly reflected in the dependence

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Intraband Optical Transitions,is energy varies between a fraction to tens of meV. As described previously, in Sect. 4.1, due to the fact that the wavelength of light from this range (≈ 1 mm) considerably exceeds the dot diameter (< 1μm), the FIR radiation cannot couple directly to the internal (relative) motion of the system of

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Interband Optical Transitions, is usually the first step in the studies of quantum dots obtained by various methods (described previously in Chap. 2). The idea of the photoluminescence experiment is presented in Fig. 6.1. A laser beam of appropriate wavelength excites the electrons from the valence band (VB) to the conduction ba

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Capacitance Spectroscopy, to the density of states d.dμ) as a function of the gate voltage .. applied perpendicularly to the quantum well. The quantum well, in which quantum dots are created, is placed above the doped layer (electrode) and serves as a reservoir of free carriers. The change of voltage .. leads to a change in

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Description of the Properties of Self-Assembled Quantum Dots Within the Band-Structure Model,of spherical lenses shown in Fig. 8.1 (for the description of properties of pyramidal SAD’s see [47]). Such a dot is formed on a narrow wetting layer of thickness .., and modeled as a part of a sphere of height . and radius at the base .. The conduction-band edge in the material of the wetting layer

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Description of an Exciton in a Quantum Dot Within the Effective-Mass Approximation,ds the dot. In the description of such a system, the effective-mass approximation can be applied if the perturbation potential varies slowly over the interatomic distance. In the case of quantum dots with sizes a few tens of nanometers, this assumption is expected to be satisfied. This also seems do