Wang Li-Gang, Zhu Shi-Yao
Department of Physics, Zhejiang University, Hangzhou, China.
Opt Lett. 2006 Jul 15;31(14):2223-5. doi: 10.1364/ol.31.002223.
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.
从理论上研究了来自弱吸收介质平板的反射光脉冲的群延迟，并且发现在平板共振附近（实部(kd)=mπ）弱吸收情况下存在大的负群延迟。反射脉冲和透射脉冲的群延迟都将随着吸收的增加而饱和。
