Investigation of the energy spectra and the electron–hole alignment of the InAs/GaAs quantum dots with an ultrathin cap layer

2016 ◽  
Vol 240 ◽  
pp. 20-23 ◽  
Author(s):  
Alexey P. Gorshkov ◽  
Natalia S. Volkova ◽  
Leonid A. Istomin ◽  
Anton V. Zdoroveishev ◽  
Sergey Levichev
Keyword(s):  
Quantum Dots ◽  
Energy Spectra ◽  
Electron Hole ◽  
Cap Layer

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.

scholarly journals Electron-Hole Crossover in Graphene Quantum Dots

2009 ◽  
Vol 103 (4) ◽  
Author(s):  
J. Güttinger ◽  
C. Stampfer ◽  
F. Libisch ◽  
T. Frey ◽  
J. Burgdörfer ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Graphene Quantum Dots ◽  
Electron Hole

Electron-hole complexes in individual semimagnetic quantum dots

2005 ◽  
Vol 202 (14) ◽  
pp. 2609-2613 ◽  
Author(s):  
P. S. Dorozhkin ◽  
A. S. Brichkin ◽  
V. D. Kulakovskii ◽  
A. V. Chernenko ◽  
S. V. Zaitsev ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Electron Hole

Two time scales of the electron–hole spin relaxation in InAs/GaAs quantum dots

2006 ◽  
Vol 243 (15) ◽  
pp. 3928-3931
Author(s):  
C. Testelin ◽  
E. Aubry ◽  
M. Chaouache ◽  
M. Maaref ◽  
F. Bernardot ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Time Scales ◽  
Spin Relaxation ◽  
Electron Hole

Hole-hole and electron-hole exchange interactions in single InAs/GaAs quantum dots

2009 ◽  
Vol 79 (12) ◽  
Author(s):  
T. Warming ◽  
E. Siebert ◽  
A. Schliwa ◽  
E. Stock ◽  
R. Zimmermann ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Exchange Interactions ◽  
Electron Hole

Homogeneous linewidth of confined electron-hole-pair states in II-VI quantum dots

1993 ◽  
Vol 47 (7) ◽  
pp. 3684-3689 ◽  
Author(s):  
U. Woggon ◽  
S. Gaponenko ◽  
W. Langbein ◽  
A. Uhrig ◽  
C. Klingshirn
Keyword(s):  
Quantum Dots ◽  
Hole Pair ◽  
Electron Hole ◽  
Electron Hole Pair ◽  
Homogeneous Linewidth

Exciton Fine Structure in Lead Chalcogenide Quantum Dots: Valley Mixing and Crucial Role of Intervalley Electron–Hole Exchange

Nano Letters ◽  
2020 ◽  
Vol 20 (12) ◽  
pp. 8897-8902
Author(s):  
Ivan D. Avdeev ◽  
Mikhail O. Nestoklon ◽  
Serguei V. Goupalov
Keyword(s):  
Quantum Dots ◽  
Fine Structure ◽  
Crucial Role ◽  
Lead Chalcogenide ◽  
Electron Hole
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