Third-order nonlinear absorption spectra of an impurity in a spherical quantum dot with different confining potential
Küçük Resim Yok
Tarih
2010
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
WILEY-V C H VERLAG GMBH
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
In this study, the linear and third-order nonlinear optical absorption coefficients of intersublevel transitions have been calculated for a spherical CdS/SiO2 quantum dot (QD) with infinite and different finite confining potential by using the density matrix formalism. The electron eigenenergies and the corresponding wavefunctions have been determined by the variational method under the effective mass approximation. We have investigated the effects of the incident optical intensity, QD radius, and confinement potential on the intersublevel optical absorption coefficients. It is found that the size of the dot and depth of the confinement have a great effect on the linear, the nonlinear, and the total absorption coefficients. Also, the total optical absorption saturation intensity is controlled by the strength of the confinement or the incident optical intensity. (C) 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Açıklama
Anahtar Kelimeler
Kaynak
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
WoS Q Değeri
Q3
Scopus Q Değeri
Q3
Cilt
247
Sayı
2
