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Discontinuity of dipole-moment matrix elements in ellipsoidally shaped nanoparticles and profiles of spectral lines. / Kereselidze, T.; Tchelidze, T.; Devdariani, A.
в: Opto-electronics Review, Том 26, № 2, 01.05.2018, стр. 134-140.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Discontinuity of dipole-moment matrix elements in ellipsoidally shaped nanoparticles and profiles of spectral lines
AU - Kereselidze, T.
AU - Tchelidze, T.
AU - Devdariani, A.
PY - 2018/5/1
Y1 - 2018/5/1
N2 - The behaviour of energy levels and optical spectra of a charged particle (electron or hole) confined within a potential well of ellipsoidal shape is investigated as a function of the shape-anisotropy parameter. If two energy levels of the same symmetry intersect in a perturbation-theory approximation, they move apart on direct diagonalization of the appropriate Hamiltonian. The intersection of the energy levels leads to a discontinuity of the corresponding dipole-moment matrix element. The discontinuity of matrix elements is not reflected in the behaviour of transition probabilities which are continuous functions of the shape-anisotropy parameter. The profiles of a spectral line emitted or absorbed by an ensemble of ellipsoidally shaped nanoparticles with a Gaussian distribution of size are calculated and discussed.
AB - The behaviour of energy levels and optical spectra of a charged particle (electron or hole) confined within a potential well of ellipsoidal shape is investigated as a function of the shape-anisotropy parameter. If two energy levels of the same symmetry intersect in a perturbation-theory approximation, they move apart on direct diagonalization of the appropriate Hamiltonian. The intersection of the energy levels leads to a discontinuity of the corresponding dipole-moment matrix element. The discontinuity of matrix elements is not reflected in the behaviour of transition probabilities which are continuous functions of the shape-anisotropy parameter. The profiles of a spectral line emitted or absorbed by an ensemble of ellipsoidally shaped nanoparticles with a Gaussian distribution of size are calculated and discussed.
KW - Ellipsoidal shape
KW - Nanoparticle
KW - Profile of spectral line
KW - Shape-anisotropy parameter
KW - INTERBAND LIGHT-ABSORPTION
KW - POTENTIAL WELL
KW - ENERGY-LEVELS
KW - OPTICAL-TRANSITIONS
KW - QUANTUM DOTS
KW - ELECTRONIC STATES
UR - http://www.scopus.com/inward/record.url?scp=85045874157&partnerID=8YFLogxK
U2 - 10.1016/j.opelre.2018.02.006
DO - 10.1016/j.opelre.2018.02.006
M3 - Article
AN - SCOPUS:85045874157
VL - 26
SP - 134
EP - 140
JO - Opto-electronics Review
JF - Opto-electronics Review
SN - 1230-3402
IS - 2
ER -
ID: 28407668