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← ScienceWhich outcome occurs when a gallium arsenide laser is stressed?
A)Increased electron-hole recombination probability occurs✓
B)Stable Fermi energy level gets maintained
C)Lasing wavelength exhibits a blue shift
D)Reduced photon emission cross-section develops
💡 Explanation
Increased stress enhances defects, causing higher electron-hole recombination via Shockley-Read-Hall (SRH) recombination mechanism because these defects act as traps inside the band gap. Therefore, non-radiative recombination increases, diminishing laser efficiency rather than maintaining Fermi levels.
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