Record W2063472861 · doi:10.1109/jqe.2015.2410340

Electronic Band Structure and Material Gain of Dilute Nitride Quantum Wells Grown on InP Substrate

2015· article· en· W2063472861 on OpenAlexafffund

M. Gładysiewicz, R. Kudrawiec, Marek S. Wartak

Bibliographic record

VenueIEEE Journal of Quantum Electronics · 2015

Typearticle

Languageen

FieldPhysics and Astronomy

TopicSemiconductor Quantum Structures and Devices

Canadian institutionsWilfrid Laurier University

FundersNatural Sciences and Engineering Research Council of CanadaNarodowym Centrum NaukiNarodowe Centrum NaukiOntario Centres of Excellence

KeywordsPhysicsStereochemistryMaterials scienceChemistry

DOI10.1109/jqe.2015.2410340

Abstract

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The eight-band kp Hamiltonian is applied to calculate electronic band structure and material gain in dilute nitride quantum wells (QWs) grown on InP substrate. Three N-containing QW materials (GaInNAs, GaNAsSb, and GaNPSb) and different N-free barriers (GaInAs, GaAsSb, GaPSb, AlGaInAs, GaInPAs, AlGaAsSb, GaPAsSb, and AlGaPSb) lattice matched to InP are analyzed. It is shown that Ga 0.17 In 0.83 N y As 1-y -QWs with Ga 0.47 In 0.53 As, Al 0.23 Ga 0.24 In 0.53 As, or Ga 0.17 In 0.83 P 0.63 As 0.37 barriers are a very good gain medium for long-wavelength lasers grown on InP substrates. For N-free QWs the transverse electric (TE) mode of the material gain develops at 2.1 μm. This gain peak shifts toward longer wavelengths upon the incorporation of nitrogen and reaches the wavelength of ~2.8 Mm for 3% N. For GaN y As 0.26-y Sb 0.74 -QWs no quantum confinement or very weak quantum confinement exist for electrons in N-free QWs with the ternary barrier (i.e., GaAs 0.51 Sb 0.49 ) and quaternary (Al 0.23 Ga 0.77 As 0.51 Sb 0.49 and GaP 0.25 As 0.15 Sb 0.60 ) barriers, respectively. However, the quantum confinement in the conduction band strongly increases after incorporation of nitrogen. For GaN y As 0.26-y Sb 0.74 -QWs with 3% N gain peak for TE mode exists at 3.2 μm. Very similar changes in electronic band structure and material gain are noticed for GaN y P 0.26-y Sb 0.74 -QWs with GaP 0.35 Sb 0.65 , Al 0.23 Ga 0.77 As 0.52 Sb 0.48 , and GaP 0.25 As 0.15 Sb 0.60 barriers. In that case gain peak (TE mode) for GaN 0.03 P 0.23 Sb 0.74 -QW with GaP 0.35 Sb 0.65 barrier is at 3.6 μm. The intensity and the shape of material gain spectra in the three QW system vary with changes of the nitrogen concentration and the barrier content. At carrier concentration of 5 × 10 18 cm -3 , the largest material gain exists for Ga 0.17 In 0.83 N y As 1-y -QWs with Al 0.23 Ga 0.24 In 0.53 As and Ga 0.17 In 0.83 As 0.37 Ga 0.63 barriers.

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How this classification was reachedexpand

Full frame distilled prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.

metaresearch head score (Codex)0.001

metaresearch head score (Gemma)0.000

Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated

Candidate categoriesMeta-epidemiology (narrow)

Consensus categoriesnone

DomainCandidate signal: none · Consensus signal: none

Study designCandidate signal: Bench or experimental · Consensus signal: Bench or experimental

GenreCandidate signal: Empirical · Consensus signal: Empirical

Teacher disagreement score0.059

Threshold uncertainty score1.000

Codex and Gemma teacher scores by category

Category	Codex	Gemma
Metaresearch	0.001	0.000
Meta-epidemiology (narrow)	0.000	0.000
Meta-epidemiology (broad)	0.001	0.000
Bibliometrics	0.000	0.000
Science and technology studies	0.000	0.000
Scholarly communication	0.000	0.000
Open science	0.000	0.000
Research integrity	0.000	0.001
Insufficient payload (model declined to judge)	0.000	0.000

Machine scores (provisional)

The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.

Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.

Opus teacher head0.016

GPT teacher head0.252

Teacher spread0.237 · how far apart the two teachers sit on this one work

Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it

Classification

machine, unvalidated

Machine predicted; a candidate call from one teacher head, not a consensus.

Meta-epidemiology (narrow)

Study designBench or experimental

Domainnot available

GenreEmpirical

How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".

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Citations9

Published2015

Admission routes2

Has abstractyes

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