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← ScienceWhich risk increases when a pulsed terahertz wave encounters a resonant metal-dielectric metasurface?
A)Reduced signal-to-noise ratio
B)Enhanced local field amplification✓
C)Decreased optical transparency
D)Increased group velocity dispersion
💡 Explanation
Enhanced local field amplification occurs because electric excitation drives surface plasmon resonance within the periodic structure. Therefore, field intensification occurs rather than reduced signal strength, due to constructive interference effects, not destructive effects or dispersion.
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