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← ScienceWhich issue increases in a pulsed laser deposition (PLD) process at very high laser fluence?
A)Particulate emission increases significantly✓
B)Substrate temperature drops rapidly
C)Desired film's crystal structure improves
D)Laser pumping efficiency notably increases
💡 Explanation
Ablation causes increased particulate ejection during PLD at high fluence because thermal runaway generates excessive kinetic energy. Therefore, particulate emission increases significantly rather than improving film structure; this occurs precisely because laser power is increased, not altered conditions.
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