scholarly journals Electron-hole localization in coupled quantum dots

2002 ◽  
Vol 65 (16) ◽  
Author(s):  
Filippo Troiani ◽  
Ulrich Hohenester ◽  
Elisa Molinari
Keyword(s):  
Quantum Dots ◽  
Electron Hole ◽  
Coupled Quantum Dots ◽  
Hole Localization

Charge Separation Between Strain Coupled Quantum Dots in a Self-Assembled InAs Quantum Dot Structure

1999 ◽  
Vol 571 ◽  
Author(s):  
W. V. Schoenfeld ◽  
T. Lundstrom ◽  
P. M. Petroff
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Preliminary Data ◽  
Charge Separation ◽  
Electron Hole ◽  
Coupled Quantum Dots ◽  
Time Resolved ◽  
Inas Quantum Dot ◽  
Storage Times ◽  
Time Resolved Photoluminescence

ABSTRACTWe present an InAs QDs structure designed to separate and store photo-generated electron-hole pairs. Charge separation in the structure is demonstrated using power dependent photoluminescence and biased photoluminescence. Preliminary data from time resolved photoluminescence suggest storage times in the device in the μsec range.

scholarly journals Strong Electron-Hole Exchange in Coherently Coupled Quantum Dots

2008 ◽  
Vol 100 (10) ◽  
Author(s):  
Stefan Fält ◽  
Mete Atatüre ◽  
Hakan E. Türeci ◽  
Yong Zhao ◽  
Antonio Badolato ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Electron Hole ◽  
Coupled Quantum Dots ◽  
Strong Electron

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.

Polarization selective magneto-optical study on the coupled quantum dots using resonant excitation

2004 ◽  
Vol 21 (2-4) ◽  
pp. 376-380 ◽  
Author(s):  
S Lee ◽  
D.Y Shin ◽  
H.S Lee ◽  
J.Y Lee ◽  
M Dobrowolska ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Resonant Excitation ◽  
Optical Study ◽  
Coupled Quantum Dots

scholarly journals Spatial mapping and manipulation of two tunnel-coupled quantum dots

2011 ◽  
Vol 83 (23) ◽  
Author(s):  
Magdalena Huefner ◽  
Bruno Kueng ◽  
Stephan Schnez ◽  
Klaus Ensslin ◽  
Thomas Ihn ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Spatial Mapping ◽  
Coupled Quantum Dots

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

Observation of exciton molecule consisting of two different excitons in coupled quantum dots

2005 ◽  
Vol 87 (25) ◽  
pp. 253110 ◽  
Author(s):  
Keishiro Goshima ◽  
Shohgo Yamauchi ◽  
Kazuhiro Komori ◽  
Isao Morohashi ◽  
Takeyoshi Sugaya
Keyword(s):  
Quantum Dots ◽  
Coupled Quantum Dots
Sign in / Sign up

Export Citation Format

Share Document