scholarly journals The dielectric function of PbS quantum dots in a glass matrix

2012 ◽  
Vol 2 (5) ◽  
pp. 496 ◽  
Author(s):  
Iwan Moreels ◽  
Detlef Kruschke ◽  
Peter Glas ◽  
Jens W. Tomm
Keyword(s):  
Quantum Dots ◽  
Dielectric Function ◽  
Glass Matrix ◽  
Pbs Quantum Dots

Nonlinear optical characterisation of CdS and PbS quantum dots dispersed in a glass matrix

2004 ◽  
Vol 1 (4) ◽  
pp. 1001-1004 ◽  
Author(s):  
F. D'Amore ◽  
S. M. Pietralunga ◽  
P. Lorusso ◽  
M. Martinelli ◽  
A. Zappettini ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Glass Matrix ◽  
Nonlinear Optical ◽  
Pbs Quantum Dots

Stimulated emission from PbS-quantum dots in glass matrix

2013 ◽  
Vol 7 (1) ◽  
pp. L1-L5 ◽  
Author(s):  
Fangyu Yue ◽  
Jens W. Tomm ◽  
Detlef Kruschke ◽  
Peter Glas
Keyword(s):  
Quantum Dots ◽  
Glass Matrix ◽  
Stimulated Emission ◽  
Pbs Quantum Dots

Nanostructure of semiconductor quantum dots in a borosilicate glass matrix by complementary use of HREM and AEM

1990 ◽  
Vol 48 (4) ◽  
pp. 728-729
Author(s):  
M.J. Kim ◽  
L.C. Liu ◽  
S.H. Risbud ◽  
R.W. Carpenter
Keyword(s):  
Quantum Dots ◽  
Borosilicate Glass ◽  
Glass Matrix ◽  
Optical Switching ◽  
Response Times ◽  
Fast Response ◽  
Processing Technique ◽  
Internal Stresses ◽  
Electron Hole ◽  
Spatial Dimensions

When the size of a semiconductor is reduced by an appropriate materials processing technique to a dimension less than about twice the radius of an exciton in the bulk crystal, the band like structure of the semiconductor gives way to discrete molecular orbital electronic states. Clusters of semiconductors in a size regime lower than 2R {where R is the exciton Bohr radius; e.g. 3 nm for CdS and 7.3 nm for CdTe) are called Quantum Dots (QD) because they confine optically excited electron- hole pairs (excitons) in all three spatial dimensions. Structures based on QD are of great interest because of fast response times and non-linearity in optical switching applications.In this paper we report the first HREM analysis of the size and structure of CdTe and CdS QD formed by precipitation from a modified borosilicate glass matrix. The glass melts were quenched by pouring on brass plates, and then annealed to relieve internal stresses. QD precipitate particles were formed during subsequent "striking" heat treatments above the glass crystallization temperature, which was determined by differential thermal analysis.

Excitonic quasimolecules containing of two quantum dots

2016 ◽  
pp. 4024-4028 ◽  
Author(s):  
Sergey I. Pokutnyi ◽  
Wlodzimierz Salejda
Keyword(s):  
Quantum Dots ◽  
Binding Energy ◽  
Exchange Interaction ◽  
Coulomb Interaction ◽  
Silicate Glass ◽  
Glass Matrix ◽  
Silicate Glass Matrix

The possibility of occurrence of the excitonic  quasimolecule formed of spatially separated electrons and holes in a nanosystem that consists  of  CuO quantum dots synthesized in a silicate glass matrix. It is shown that the major contribution to the excitonic quasimolecule binding energy is made by the energy of the exchange interaction of electrons with holes and this contribution is much more substantial than the contribution of the energy of Coulomb interaction between the electrons and holes.

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