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Absorption spectra of a donor impurity in a quantum ring
Author(s) -
Xie Wenfang
Publication year - 2009
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200844349
Subject(s) - excited state , radius , ground state , wave function , absorption (acoustics) , absorption spectroscopy , atomic physics , two photon absorption , spectral line , chemistry , ring (chemistry) , molecular physics , impurity , attenuation coefficient , physics , quantum mechanics , optics , laser , computer security , organic chemistry , computer science
The linear and the third‐order nonlinear optical absorption spectra of a donor impurity confined by a quantum ring are studied using the matrix diagonalization method within the effective‐mass approximation. The linear and the third‐order nonlinear optical absorption coefficients between the ground ( L = 0) and the first excited state ( L = 1) have been examined based on the computed energies and wavefunctions. The results are presented as a function of the incident photon energy for the different values of the confinement strength, the incident optical density and the ring radius. We found the confinement strength, the incident optical density and the ring radius have a great effect on the linear, the third‐order nonlinear and total absorption spectra. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)