Superluminal pulse reflection from a weakly absorbing dielectric slab
Li-Gang Wang, Shi-Yao Zhu
Abstract
Group delay for a reflected light pulse from a weakly absorbing dielectric slab is theoretically investigated, and large negative group delay is found for weak absorption near a resonance of the slab (Re(kd)=mπ). The group delays for both the reflected and transmitted pulses will be saturated with the increase of the absorption.
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