scholarly journals The photoionization cross section of a hydrogenic impurity in a multi-layered spherical quantum dot

2012 ◽  
Vol 111 (8) ◽  
pp. 084317 ◽  
Author(s):  
Mehmet Şahin ◽  
Firdes Tek ◽  
Ahmet Erdinç
Keyword(s):  
Quantum Dot ◽  
Cross Section ◽  
Photoionization Cross Section ◽  
Hydrogenic Impurity ◽  
Spherical Quantum Dot

Photoionization cross section and refractive-index change of hydrogenic impurities in a CdS-SiO2 spherical quantum dot

Open Physics ◽  
2010 ◽  
Vol 8 (3) ◽  
Author(s):  
Sait Yılmaz ◽  
Haluk Şafak ◽  
Recep Şahingoz ◽  
Mustafa Erol
Keyword(s):  
Refractive Index ◽  
Quantum Dot ◽  
Cross Section ◽  
Refractive Index Change ◽  
Photoionization Cross Section ◽  
Optical Intensity ◽  
Hydrogenic Impurity ◽  
Index Change ◽  
Energy Eigenvalues ◽  
Spherical Quantum Dot

AbstractIn this study, we calculate the photoionization cross section and refractive-index change of an on-center hydrogenic impurity in a CdS-SiO2 spherical quantum dot. In numerical calculations, both the finite- and infinite-confinement cases are considered and a variational scheme is adopted to determine the energy eigenvalues for the impurity. The variations of the photoionization cross section with the dot radius, the refractive-index change, and the normalized photon energy are investigated, and the effect of the potential-barrier height on the cross section is discussed. The results obtained show that the photoionization cross section and the refractive-index change in CdS-SiO2 spherical quantum dots are sensitively dependent on the incident optical intensity and on the dot sizes.

PHOTOIONIZATION CROSS-SECTION AND OSCILLATOR STRENGTH OF HYDROGENIC IMPURITIES IN ZnS/SiO2 QUANTUM DOTS

2009 ◽  
Vol 23 (08) ◽  
pp. 2127-2138 ◽  
Author(s):  
SAİT YILMAZ ◽  
HALUK ŞAFAK
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Barrier Height ◽  
Oscillator Strength ◽  
Potential Barrier ◽  
Cross Section ◽  
Photoionization Cross Section ◽  
Potential Barrier Height ◽  
Electronic Transitions ◽  
Spherical Quantum Dot

In this study, the photoionization cross-section and oscillator strength for the intersubband electronic transitions associated with an on-center impurity in the ZnS / SiO 2 spherical quantum dot have been calculated. The effects of dot radius, the normalized photon energy and the potential barrier height on the cross-section have been investigated. In the calculations, both the infinite and finite confinement cases have been considered.

Photoionization cross section and binding energy of single dopant in hollow cylindrical core/shell quantum dot

2017 ◽  
Vol 121 (6) ◽  
pp. 064303 ◽  
Author(s):  
E. Feddi ◽  
M. El-Yadri ◽  
F. Dujardin ◽  
R. L. Restrepo ◽  
C. A. Duque
Keyword(s):  
Binding Energy ◽  
Quantum Dot ◽  
Cross Section ◽  
Photoionization Cross Section ◽  
Core Shell
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