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- W2017679107 abstract "ABSTRACT The many-body optical gain with piezoelectric field effects in wurtzite GaN/Al,Gai_N quantum-well lasers isinvestigated as a function of compressive strain and well thickness. Our self-consistent (SC) model, which solvesself-consistently the band structure with the piezoelectric field, shows that the peak gain gradually decreases withincreasing compressive strain at a fixed carrier density. On the other hand, a flat-band (FB) model ignoring thepiezoelectric field shows an increase of the peak gain with compressive strain. This means that quantum-well (QW)lasers with a larger strain does not improve the laser gain due to the large strain-induced piezoelectric field in the well and it is important to use the self-consistent model to account for the piezoelectric field effects. For a fixed strain in the well using an aluminum mole fraction x = 0.2 in the barriers, our models show that, at a given carrier density,optical gain increases with well thickness until 3.5 nm, then remains almost constant. It indicates an optimum wellwidth for optical gain.Keywords: Piezoelectric field, many-body, optical gain, wurtzite, quantum-well, GaN/AIGaN" @default.
- W2017679107 created "2016-06-24" @default.
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- W2017679107 date "1999-08-06" @default.
- W2017679107 modified "2023-09-23" @default.
- W2017679107 title "Structural dependencies of many-body optical gain with piezoelectric field effects in wurtzite GaN/AlGaN quantum well lasers" @default.
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- W2017679107 doi "https://doi.org/10.1117/12.356865" @default.
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