Quantum size effects on the third order optical nonlinearity of CdS quantum dots in Nafion

2000 ◽  
Vol 185 (4-6) ◽  
pp. 457-465 ◽  
Author(s):  
P. Nandakumar ◽  
C. Vijayan ◽  
Y.V.G.S. Murti
Keyword(s):  
Quantum Dots ◽  
Size Effects ◽  
Optical Nonlinearity ◽  
Quantum Size Effects ◽  
Cds Quantum Dots ◽  
Third Order ◽  
The Third ◽  
Quantum Size

NOVEL NUMERICAL METHOD FOR THE SOLUTION OF SCHRÖDINGER'S EQUATION: EXCITON ENERGY OF CdS QUANTUM DOTS

2002 ◽  
Vol 16 (27) ◽  
pp. 4093-4103 ◽  
Author(s):  
S. BASKOUTAS ◽  
M. RIETH ◽  
A. F. TERZIS ◽  
V. KAPAKLIS ◽  
C. POLITIS
Keyword(s):  
Quantum Dots ◽  
Numerical Method ◽  
Size Effects ◽  
Quantum Size Effects ◽  
Cds Quantum Dots ◽  
Exciton Energy ◽  
Mass Approximation ◽  
Quantum Size ◽  
Self Consistent ◽  
Experimental Values

Studying the quantum size effects on the exciton energy of two-dimensional CdS quantum dots in the single band effective mass approximation for both electron and hole, we use a finite confinement in the x–y plane and we assume also that the induced charge is spread along a very thin interface in the z-direction. Solving the Schrödinger equation with a new numerical method, which is called potential morphing method, we obtain the corresponding energy within the self-consistent Hartree scheme. Excellent agreement is obtained with the experimental values of exciton energies for various sizes of CdS quantum dots in the strong, medium and weak confinement limit.

OPTICAL NONLINEARITY OF CdSe AND CdSe-C60 QUANTUM DOT

2008 ◽  
Vol 22 (32) ◽  
pp. 3207-3213 ◽  
Author(s):  
HAO SONG ◽  
YUE-YING ZHAI ◽  
ZHANG-KAI ZHOU ◽  
ZHONG-HUA HAO ◽  
LI ZHOU
Keyword(s):  
Quantum Dots ◽  
Nonlinear Refraction ◽  
Refraction Index ◽  
Optical Nonlinearity ◽  
Cdse Quantum Dots ◽  
Cdse Qds ◽  
Third Order ◽  
Picosecond Pulses ◽  
Nonlinear Properties ◽  
The Third

The third-order optical nonlinear properties of CdSe quantum dots (QDs) and CdSe - C 60 QDs are investigated by Z-scan technique with picosecond pulses at the wavelength of 800 nm. The value of the nonlinear absorption coefficient β of CdSe - C 60 QDs is measured to be 2.9 cm/GW, which is about two times larger than that of CdSe QDs. The nonlinear refraction index γ of CdSe - C 60 QDs is -2.8 × 10-3 cm 2/ GW , which is about seven times larger than that of CdSe QDs. Presence of C 60 contributes to the larger optical nonlinearity of CdSe - C 60 QDs comparing with CdSe QDs.

QUANTUM SIZE EFFECTS ON THE ENERGY LEVELS AND FAR-INFRARED SPECTRA: CHANGES FROM QUANTUM DOTS TO QUANTUM RINGS

2007 ◽  
Vol 21 (27) ◽  
pp. 4715-4724
Author(s):  
HUI PAN
Keyword(s):  
Quantum Dots ◽  
Infrared Spectra ◽  
Size Effects ◽  
Energy Levels ◽  
Far Infrared ◽  
Electron Interaction ◽  
Quantum Size Effects ◽  
Quantum Rings ◽  
Quantum Size ◽  
Far Infrared Spectra

The energy levels and far-infrared spectra of two electrons confined in quantum dots and quantum rings under a magnetic field have been investigated. The size and shape effects of quantum rings on the levels and the spectra are clearly revealed. It is found that the spin oscillation of two electrons in a quantum ring with a magnetic field is caused by the Coulomb interaction. The transitions of two-electron far-infrared spectra are clearly shown from quantum dots to quantum rings. The influence of electron–electron interaction on the energy levels and far-infrared spectra has been discussed. The quantum size effects predict a possibility to observe phenomena related to electron-electron interaction in quantum rings.

Experimental and theoretical investigation of the third-order nonlinearity in CdS quantum dots in a dendrimer matrix

2006 ◽  
Author(s):  
M. J. Potasek ◽  
Y. Gao ◽  
Michael Etienne ◽  
Roger Dorsinville ◽  
David Bauer ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Theoretical Investigation ◽  
Cds Quantum Dots ◽  
Third Order ◽  
The Third ◽  
Third Order Nonlinearity

Quantum size effects of CO reactivity on metallic quantum dots

2006 ◽  
Vol 600 (1) ◽  
pp. 6-14 ◽  
Author(s):  
V. Lindberg ◽  
T. Petersson ◽  
B. Hellsing
Keyword(s):  
Quantum Dots ◽  
Size Effects ◽  
Quantum Size Effects ◽  
Quantum Size
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