Strain-induced localized states within the matrix continuum of self-assembled quantum dots

2009 ◽  
Vol 95 (2) ◽  
pp. 023108 ◽  
Author(s):  
Voicu Popescu ◽  
Gabriel Bester ◽  
Alex Zunger
Keyword(s):  
Quantum Dots ◽  
Localized States ◽  
The Matrix ◽  
Self Assembled

Lateral Coupling of Self-Assembled Quantum Dots Studied by Near-Field Spectroscopy

1999 ◽  
Vol 571 ◽  
Author(s):  
H.D. Robinson ◽  
B.B. Goldberg ◽  
J.L. Merz
Keyword(s):  
Quantum Dots ◽  
Additional Data ◽  
High Spatial Resolution ◽  
Large Fraction ◽  
Near Field ◽  
Localized States ◽  
Emission Lines ◽  
Lateral Coupling ◽  
Self Assembled ◽  
Density Regime

ABSTRACTLateral coupling between separate quantum dots has been observed in a system of In0.55A10.45As self-assembled quantum dots. The experiment was performed by taking photoluminescence excitation (PLE) spectra in the optical near-field at 4.2 K. The high spatial resolution afforded by the near-field technique allows us to resolve individual dots in a density regime where interactions between neighboring dots become apparent. In the PLE spectra, narrow resonances are observed in the emission lines of individual dots. A large fraction of these resonances occur simultaneously in several emission lines, originating from different quantum dots. This is evidence of interdot scattering of carriers, which additional data show to be mediated by localized states at energies below the wetting layer exciton energy. A very rich phonon spectrum generated by the complicated interfaces between barrier and dot material is also evident in the data.

Magnetotunneling spectroscopy imaging of electron wave functions in self-assembled InAs quantum dots

2001 ◽  
Vol 171 (12) ◽  
pp. 1365
Author(s):  
E.E. Vdovin ◽  
Yu.N. Khanin ◽  
Yu.V. Dubrovskii ◽  
A. Veretennikov ◽  
A. Levin ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Wave Functions ◽  
Electron Wave ◽  
Inas Quantum Dots ◽  
Self Assembled

Photon echo study of excitons and excitonic complexes in self-assembled quantum dots

2007 ◽  
Vol 122-123 ◽  
pp. 730-734 ◽  
Author(s):  
Michio Ikezawa ◽  
Selvakumar Nair ◽  
Fumitaka Suto ◽  
Yasuaki Masumoto ◽  
Chikako Uchiyama ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Photon Echo ◽  
Self Assembled

Unveiling structural properties of self-assembled quantum dots

2013 ◽  
Author(s):  
M. Gunasekera ◽  
C. Rajapaksha ◽  
A. Freundlich
Keyword(s):  
Quantum Dots ◽  
Structural Properties ◽  
Self Assembled
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