Analyzing GaAs Quantum Wells Emission Spectrum

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SUMMARY

The discussion focuses on the analysis of GaAs quantum wells emission spectrum, specifically addressing discrepancies in predicting light transitions using an Excel program. The program accurately predicts heavy transitions but shows a 20-30% error rate for light transitions. The user attributes this issue to potential warping of the light band and a transition from 3D to 2D behavior affecting effective mass and energy gap. Key conclusions highlight the importance of understanding warping in both heavy and light bands and the breakdown of degeneracy in quantum wells.

PREREQUISITES
  • Understanding of GaAs band structure
  • Knowledge of quantum well physics
  • Familiarity with semiconductor fundamentals
  • Proficiency in Excel for data analysis
NEXT STEPS
  • Research the effects of band warping in semiconductor materials
  • Explore the transition from 3D to 2D behavior in quantum wells
  • Learn about effective mass calculations in semiconductor physics
  • Investigate methods for minimizing errors in emission spectrum predictions
USEFUL FOR

Researchers, physicists, and engineers working with semiconductor materials, particularly those focused on quantum wells and emission spectrum analysis.

Braggplane
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Hi guys! i have some troubles with my analysis on a GaAs quantum wells emission spectrum! I made this program on excel capable of predict heavy and light transitions and expected heavy transitions are like perfectly matched, while there are about 20-30% of errors on light transitions.

My program works with experimental data of bulk GaAs band structure, so my explanation up to now is to suppose a warping on the light band with the transition to 3D to 2D behaviour capable of changing the effective mass and/or the gap, does anyone know something about? (the thicker the well, the bigger the error)

thank you very much!
 
I do come to new conclusions days ago! for everyone interested, the reason is in fundamentals of semiconductor

(there are important warping in both heavy and ligth bands and a rupture of degeneration when confining the system in a quantum well)
 

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