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- W2616236439 abstract "The electronic band structure of strained GaSbBi/GaAs heterostructures are investigated using a 14 band k·p Hamiltonian which is an extended form of the 12 band Valance band Anticrossing (VBAC) matrix. The shift in the valence and conduction sub bands due to the incorporation of Bi in GaSb/GaAs Type II system are calculated and compared with the available experimental data. Unlike the band gap reduction of 51 meV and enhancement of spin-orbit splitting energy by ∼27 meV in bulk GaSb0.987Bi0.013, 7.3% compressive strain in GaSbBi/GaAs quantum wells (QWs) amends the scenario completely by increasing the band gap to 1.12 eV and the spin-orbit splitting energy to 1.217 eV. The dispersion relations and effective masses of the carriers in the crystal directions Δ, Λ and Σ are calculated near the Γ point using this Hamiltonian yield some interesting results. The variation of the optical gain with the density of injected carriers and dimension of the QW is calculated and the peak of the gain curve exhibits a shift towards lower wavelengths with the decrease in the width of the QWs." @default.
- W2616236439 created "2017-05-26" @default.
- W2616236439 creator A5029893631 @default.
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- W2616236439 date "2017-09-01" @default.
- W2616236439 modified "2023-09-26" @default.
- W2616236439 title "Calculation of band structure and optical gain of type-II GaSbBi/GaAs quantum wells using 14-band k·p Hamiltonian" @default.
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- W2616236439 doi "https://doi.org/10.1016/j.spmi.2017.05.032" @default.
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