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Intersubband optical absorption coefficients and refractive index changes in a V‐groove quantum wire
Author(s) -
Khordad R.,
Khaneghah S. K.
Publication year - 2011
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.201046348
Subject(s) - refractive index , attenuation coefficient , optics , absorption (acoustics) , materials science , intensity (physics) , step index profile , self focusing , ray , atomic physics , optical fiber , laser , physics , graded index fiber , laser beams , fiber optic sensor
In this paper, the intersubband optical absorption coefficients and the refractive index changes are studied in a V‐groove quantum wire. We use analytical expressions for these properties obtained by the compact‐density matrix formalism. In this regard, the linear, nonlinear and total intersubband absorption coefficients and refractive index changes are investigated as a function of the bend width wire ( b ), the incident optical intensity ( I ), and the angle θ . According to the results obtained from the present work, it is deduced that: (i) The linear terms in the refractive index changes and absorption coefficients dose not change with incident optical intensity whereas nonlinear terms depend on incident optical intensity; (ii) The total refractive index changes and the absorption coefficients reduce as the incident optical intensity increases; (iii) The total absorption coefficient and refractive index changes increase and also shift toward higher energies as the bend width wire increases; and (iv) The total refractive index changes and absorption coefficients shift toward higher energies as the angle θ increases.