Absorption and Optical Gain Spectra and Band Gap Renormalization of Highly Excited Quantum Well Systems

Ell, C.; Haug, H.

doi:10.1002/pssb.2221590113

Cited by 30 publications

(6 citation statements)

References 12 publications

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“…For InGaAs/InP strained quantum wells, the remaining enhancement of the gain is of the order 10 % [34]. Nevertheless, there is a significant amount of bandgap renormalisation [34,35], making the energetic position of the maximum gain dependent on carrier density. Therefore, many-particle effects have only minor consequences for the static properties of strained quantum well lasers made from arsenide and phosphide-based materials.…”

Section: Many-particle Effectsmentioning

confidence: 99%

Optical gain, gain saturation, and waveguiding in group III‐nitride heterostructures

Rowe

Vehse

Michler

et al. 2003

phys. stat. sol. (c)

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PACS 78.20.Bh, 78.45+h, 78.55.Cr, 78.66.Fd, 78.67.De The optical gain and waveguiding properties of nitride heterostructures are essential prerequisites for device optimisation. We address the mechanism of optical gain using direct measurements of optical gain spectra and demonstrate the impact of polarisation fields. Limits to the optical gain are shown to be imposed by carrier escape and by gain saturation. Control of guided modes by waveguiding nitride structures differs from other materials due to their birefringence. Careful optimisation is therefore needed in order to obtain good far-field properties.

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Section: Many-particle Effectsmentioning

confidence: 99%

Optical gain, gain saturation, and waveguiding in group III‐nitride heterostructures

Rowe

Vehse

Michler

et al. 2003

phys. stat. sol. (c)

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“…The first one is the exciton-Mott crossover between exciton gas and e-h plasma seen at high temperatures. [49][50][51][52][53][54][55][56][57][58][59][60][61][62][63] Experimentally, this crossover is observed as the drastic but continuous reduction of the excitonic resonance in the interband absorption-gain and in the photoluminescence spectra.…”

Section: Introductionmentioning

confidence: 99%

“…Ever since Mott himself argued, 1) the exciton-Mott physics has been considered in terms of the Mott density, at which the effective exciton binding energy vanishes. This concept is figured out most clearly by means of the so-called semiconductor-Bloch equation (SBE) 5,51,[53][54][55]58) , a theory assuming a single e-h pair embedded in the completely ionized e-h plasma, neglecting the finite carrier lifetime induced by the inter-carrier scattering. More specifically, the selfenergies are evaluated with the quasistatic screened Hartree-Fock approximation (SHFA), and the excitonic correlation is taken into account via the screened e-h T -matrix.…”

Section: Introductionmentioning

confidence: 99%

Exciton–Mott Physics in Two-Dimensional Electron–Hole Systems: Phase Diagram and Single-Particle Spectra

Asano

Yoshioka

2014

J. Phys. Soc. Jpn.

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Exciton Mott physics in two-dimensional electron-hole (e-h) systems is studied in the quasiequilibrium, which is the crossovers or phase transitions between the insulating exciton gas and the metallic e-h plasma. By developing a self-consistent screened T -matrix approximation, we succeed in obtaining the "global" phase diagram on the plane of the e-h density and the temperature as a contour plot of the exciton ionization ratio. The detailed features of the exciton-Mott crossover at high temperature are figured out beyond the conventionally used concept of the Mott density. At low temperature, we find not only the region unstable toward the inhomogeneity but the pure Mott transition point characterized by the discontinuity in the ionization ratio. The single particle spectra also exhibit interesting features reflecting the excitonic correlations.

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“…Here we have omitted the interband term of the Coulomb interaction which can be small for nanostructures. 86 Note that the dielectric mismatch effect has been taken into account in the ee Coulomb interaction.…”

Section: Conclusion and Discussionmentioning

confidence: 99%

Kinetic theory of surface plasmon polariton in semiconductor nanowires

Yin

2013

Phys. Rev. B

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Based on the semiclassical model Hamiltonian of the surface plasmon polariton and the nonequilibrium Green-function approach, we present a microscopic kinetic theory to study the influence of the electron scattering on the dynamics of the surface plasmon polariton in semiconductor nanowires. The damping of the surface plasmon polariton originates from the resonant absorption by the electrons (Landau damping), and the corresponding damping exhibits size-dependent oscillations and distinct temperature dependence without any scattering. The scattering influences the damping by introducing a broadening and a shifting to the resonance. To demonstrate this, we investigate the damping of the surface plasmon polariton in InAs nanowires in the presence of the electron-impurity, electron-phonon and electron-electron Coulomb scatterings. The main effect of the electron-impurity and electron-phonon scatterings is to introduce a broadening, whereas the electron-electron Coulomb scattering can not only cause a broadening, but also introduce a shifting to the resonance. For InAs nanowires under investigation, the broadening due to the electron-phonon scattering dominates. As a result, the scattering has a pronounced influence on the damping of the surface plasmon polariton: The size-dependent oscillations are smeared out and the temperature dependence is also suppressed in the presence of the scattering. These results demonstrate the the important role of the scattering on the surface plasmon polariton damping in semiconductor nanowires.Comment: 21 pages, 11 figure

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Absorption and Optical Gain Spectra and Band Gap Renormalization of Highly Excited Quantum Well Systems

Cited by 30 publications

References 12 publications

Optical gain, gain saturation, and waveguiding in group III‐nitride heterostructures

Optical gain, gain saturation, and waveguiding in group III‐nitride heterostructures

Exciton–Mott Physics in Two-Dimensional Electron–Hole Systems: Phase Diagram and Single-Particle Spectra

Kinetic theory of surface plasmon polariton in semiconductor nanowires

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