Luminescence and photo-excitation properties of laser heterostructures with CdSe/ZnSe quantum dots

2006 ◽  
Vol 3 (11) ◽  
pp. 4031-4034
Author(s):  
O. G. Lyublinskaya ◽  
I. V. Sedova ◽  
S. V. Sorokin ◽  
A. A. Toropov ◽  
S. V. Ivanov
Keyword(s):  
Quantum Dots ◽  
Laser Heterostructures

Photocurrent in self-organized InAs quantum dots in 1.3 μm InAs/InGaAs/GaAs semiconductor laser heterostructures

2006 ◽  
Vol 40 (1) ◽  
pp. 84-88 ◽  
Author(s):  
A. V. Savel’ev ◽  
M. V. Maksimov ◽  
V. M. Ustinov ◽  
R. P. Seĭsyan
Keyword(s):  
Quantum Dots ◽  
Semiconductor Laser ◽  
Inas Quantum Dots ◽  
Self Organized ◽  
Laser Heterostructures

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.

Attenuation of surface acoustic waves by quantum dots

1998 ◽  
Vol 77 (5) ◽  
pp. 1195-1202
Author(s):  
Andreas Knabchen Yehoshua, B. Levinson, Ora
Keyword(s):  
Quantum Dots ◽  
Acoustic Waves ◽  
Surface Acoustic Waves
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