Journal ArticleDOI
Theory of the linear and nonlinear optical properties of semiconductor microcrystallites
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In this article, the optical properties of ideal semiconductor crystallites so small that they show quantum confinement in all three dimensions [quantum dots (QD's)] were analyzed theoretically, and the phonon broadening of these lines was considered.Abstract:
We analyze theoretically the optical properties of ideal semiconductor crystallites so small that they show quantum confinement in all three dimensions [quantum dots (QD's)]. In the limit of a QD much smaller than the bulk exciton size, the linear spectrum will be a series of lines, and we consider the phonon broadening of these lines. The lowest interband transition will saturate like a two-level system, without exchange and Coulomb screening. Depending on the broadening, the absorption and the changes in absorption and refractive index resulting from saturation can become very large, and the local-field effects can become so strong as to give optical bistability without external feedback. The small QD limit is more readily achieved with narrow-band-gap semiconductors.read more
Citations
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Semiconductor Clusters, Nanocrystals, and Quantum Dots
TL;DR: In this article, the authors focus on the properties of quantum dots and their ability to join the dots into complex assemblies creates many opportunities for scientific discovery, such as the ability of joining the dots to complex assemblies.
Journal ArticleDOI
Perspectives on the Physical Chemistry of Semiconductor Nanocrystals
TL;DR: In this paper, the present status and new opportunities for research in this area of materials physical chemistry are reviewed, as well as a review of the present state and opportunities in this field.
Journal ArticleDOI
Highly Efficient Multiple Exciton Generation in Colloidal PbSe and PbS Quantum Dots
Randy J. Ellingson,Matthew C. Beard,Justin C. Johnson,Pingrong Yu,Olga I. Micic,Arthur J. Nozik,Andrew Shabaev,Alexander L. Efros +7 more
TL;DR: It is found that the biexciton effect, which shifts the transition energy for absorption of a second photon, influences the early time transient absorption data and may contribute to a modulation observed when probing near the lowest interband transition.
Journal ArticleDOI
Lead Salt Quantum Dots: the Limit of Strong Quantum Confinement
TL;DR: Recent research on lead salt quantum dots is reviewed, which suggests that lead salt nanostructures may be the only materials in which the electronic energies are determined primarily by quantum confinement.
Journal ArticleDOI
Low-dimensional systems: quantum size effects and electronic properties of semiconductor microcrystallites (zero-dimensional systems) and some quasi-two-dimensional systems
TL;DR: In this paper, a review is concerned with quantum confinement effects in low-dimensional semiconductor systems, focusing on the optical properties, including luminescence, of nanometre-sized microcrystals.
References
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Journal ArticleDOI
Electronic Shell Structure and Abundances of Sodium Clusters
Walter D. Knight,Keith Clemenger,Walt A. de Heer,Winston A. Saunders,Mei-Yin Chou,Marvin L. Cohen +5 more
TL;DR: In this paper, a mass spectra for sodium clusters of $N$ atoms per cluster, produced in a supersonic expansion with argon carrier gas, is presented. The spectra show large peaks or steps at $N=8, 20, 40, 58, \mathrm{and} 92$.
Journal ArticleDOI
Electric field dependence of optical absorption near the band gap of quantum-well structures.
David A. B. Miller,Daniel S. Chemla,T. C. Damen,Arthur C. Gossard,W. Wiegmann,Thomas H. Wood,Charles A. Burrus +6 more
TL;DR: Detailed calculations of the shift of exciton peaks are presented including (i) exact solutions for single particles in infinite wells, (ii) tunneling resonance calculations for finite wells, and (iii) variational calculations ofexciton binding energy in a field.
Journal ArticleDOI
Band-Edge Electroabsorption in Quantum Well Structures: The Quantum-Confined Stark Effect
David A. B. Miller,Daniel S. Chemla,T. C. Damen,Arthur C. Gossard,W. Wiegmann,Thomas H. Wood,Charles A. Burrus +6 more
TL;DR: In this article, the authors present theory and extended experimental results for the large shift in optical absorption in GaAs-AlGaAs quantum well structures with electric field perpendicular to the layers.
Journal ArticleDOI
Theory of Light Absorption and Non-Radiative Transitions in F-Centres
Kun Huang,Avril Rhys +1 more
TL;DR: In this paper, a quantitative theory for the shapes of the absorption bands of F -centres is given on the basis of the Franck-Condon principle, and it is shown that the absorption constant as a function of frequency and temperature can be expressed in terms of Bessel functions with imaginary arguments.
Journal ArticleDOI
Quantum size effect in semiconductor microcrystals
TL;DR: In this paper, a growth technique of the semiconductor microcrystals in a glassy dielectric matrix has been developed, which permits to vary the size of the grown microcrystal in a controlled manner from some tens to thousands of angstroms.