Superluminal pulse reflection from a weakly absorbing dielectric slab.
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)=mpi]. The group delay for both the reflected and transmitted pulses will be saturated with an increase of the absorption.
Wang
Li-Gang
LG
Department of Physics, Zhejiang University, Hangzhou, China. sxwlg@yahoo.com.cn
Zhu
Shi-Yao
SY