Intersubband Optical Transitions in Nitride Based Group-III Semiconductor Quantum Dots

2014 ◽  
Vol 3 (4) ◽  
pp. 282-288 ◽  
Author(s):  
K. Jaya Bala ◽  
A. John Peter
Keyword(s):  
Quantum Dots ◽  
Semiconductor Quantum Dots ◽  
Optical Transitions ◽  
Group Iii

Enhanced probabilities of phonon-assisted optical transitions in semiconductor quantum dots

2002 ◽  
Vol 13 (2) ◽  
pp. 163-168 ◽  
Author(s):  
J T Devreese ◽  
V M Fomin ◽  
V N Gladilin ◽  
E P Pokatilov ◽  
S N Klimin
Keyword(s):  
Quantum Dots ◽  
Semiconductor Quantum Dots ◽  
Optical Transitions

Optical Spectroscopy of Single Self Assembled Quantum Dots

1999 ◽  
Vol 571 ◽  
Author(s):  
E. Dekel ◽  
D. Gershoni ◽  
E. Ehrenfreund ◽  
J.M. Garcia ◽  
P.M. Petroff
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Line Emission ◽  
Semiconductor Quantum Dots ◽  
Spectral Lines ◽  
Rate Equations ◽  
Measured Spectrum ◽  
Optical Transitions ◽  
Many Body ◽  
Self Assembled

ABSTRACTWe applied low temperature diffraction limited confocal optical microscopy to spatially resolve, and spectroscopically study photoluminescence from single self-assembled semiconductor quantum dots. Using selective wavelength imaging we unambiguously demonstrated that a single photoexcited quantum dot emits light in a few very narrow spectral lines. By solving numerically a many body Hamiltonian for a model quantum dot, we show that the multi-line emission spectrum is due to optical transitions between confined exciton multiplexes. We explain the measured spectrum and its dependence on the power of either cw or pulsed excitation by analytically solving the coupled rate equations for the excitation relaxation between these exciton multiplexes.

Spectral diffusion and fine structure splitting of optical transitions in semiconductor quantum dots

2001 ◽  
Author(s):  
Gerd Bacher ◽  
Jochen Seufert ◽  
R. Weigand ◽  
M. Obert ◽  
Vladimir D. Kulakovskii ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Fine Structure ◽  
Semiconductor Quantum Dots ◽  
Spectral Diffusion ◽  
Optical Transitions ◽  
Fine Structure Splitting ◽  
Structure Splitting

Semiconductor Quantum Dots for Multicolor Fluorescence Imaging and Spectroscopy of Single Cancer Cells

2003 ◽  
Vol 773 ◽  
Author(s):  
Xiaohu Gao ◽  
Shuming Nie ◽  
Wallace H. Coulter
Keyword(s):  
Quantum Dots ◽  
Cancer Cells ◽  
Fluorescence Imaging ◽  
Organic Dyes ◽  
Fluorescent Proteins ◽  
Single Cells ◽  
Quantitative Imaging ◽  
Semiconductor Quantum Dots ◽  
Single Cancer ◽  
Imaging And Spectroscopy

AbstractLuminescent quantum dots (QDs) are emerging as a new class of biological labels with unique properties and applications that are not available from traditional organic dyes and fluorescent proteins. Here we report new developments in using semiconductor quantum dots for quantitative imaging and spectroscopy of single cancer cells. We show that both live and fixed cells can be labeled with multicolor QDs, and that single cells can be analyzed by fluorescence imaging and wavelength-resolved spectroscopy. These results raise new possibilities in cancer imaging, molecular profiling, and disease staging.

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