Photoionization Cross Section and Refractive-İndex Change of Hydrogenic Impurities in a CdS-SiO2 Spherical Quantum Dot
Yükleniyor...
Dosyalar
Tarih
2010
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Versita
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
In 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.
Açıklama
Anahtar Kelimeler
Photoionization cross section, Refractive-index change, Hydrogenic impurities, Quantum dots
Kaynak
Central European Journal of Physics
WoS Q Değeri
Q3
Scopus Q Değeri
N/A
Cilt
8
Sayı
3
Künye
Yılmaz, S., Şafak, H., Şahingöz, R., Erol, M., (2010). Photoionization Cross Section and Refractive-İndex Change of Hydrogenic Impurities in a CdS-SiO2 Spherical Quantum Dot. Central European Journal of Physics, 8(3), 438-444. Doi: 10.2478/s11534-009-0115-8
