A systematic analysis of the linear and nonlinear optical properties of realistic quantum wires is presented. The proposed theoretical approach, based on a set of generalized semiconductor Bloch equations, provides a full three-dimensional multisubband description of carrier-carrier correlation for any profile of the confinement potential, thus allowing a direct comparison with experiments on available structures, In agreement with previous investigations based on simplified one-dimensional models, our analysis shows that. also for realistic quantum-wire structures, electron-hole Coulomb correlation completely removes the one-dimensional bandedge singularities from the linear-absorption spectra. Moreover. we find that this effect is present also at high densities (corresponding to gain regimes) and contributes significantly in suppressing the ideal sharp features of the free-carrier density of states. The multisubband nature of available state-of-the-art structures is found to play a dominant role in determining the overall spectral shape in the whale density range.
Linear and nonlinear optical properties of realistic quantum-wire structures: The dominant role of Coulomb correlation / Rossi, F; Molinari, Elisa. - In: PHYSICAL REVIEW. B, CONDENSED MATTER. - ISSN 0163-1829. - STAMPA. - 53:(1996), pp. 16462-16473.
Linear and nonlinear optical properties of realistic quantum-wire structures: The dominant role of Coulomb correlation
MOLINARI, Elisa
1996
Abstract
A systematic analysis of the linear and nonlinear optical properties of realistic quantum wires is presented. The proposed theoretical approach, based on a set of generalized semiconductor Bloch equations, provides a full three-dimensional multisubband description of carrier-carrier correlation for any profile of the confinement potential, thus allowing a direct comparison with experiments on available structures, In agreement with previous investigations based on simplified one-dimensional models, our analysis shows that. also for realistic quantum-wire structures, electron-hole Coulomb correlation completely removes the one-dimensional bandedge singularities from the linear-absorption spectra. Moreover. we find that this effect is present also at high densities (corresponding to gain regimes) and contributes significantly in suppressing the ideal sharp features of the free-carrier density of states. The multisubband nature of available state-of-the-art structures is found to play a dominant role in determining the overall spectral shape in the whale density range.Pubblicazioni consigliate
I metadati presenti in IRIS UNIMORE sono rilasciati con licenza Creative Commons CC0 1.0 Universal, mentre i file delle pubblicazioni sono rilasciati con licenza Attribuzione 4.0 Internazionale (CC BY 4.0), salvo diversa indicazione.
In caso di violazione di copyright, contattare Supporto Iris