Existence of Dual-Peak Temporal Reflectance from a Light Pulse Irradiated Two-Layer Medium

Abstract

The transport process of ultra-short light pulse propagation inside the nonemitting, absorbing, and scattering two-layer media is studied. Under the appropriate combination of the pulse width and scattering property of the probed medium, the temporal signal of the reflectance exhibits a direct correlation between the reflectance signal rise time and the location of the interface. The geometry under study is a two-layer structure. This study extends a prior work by authors, giving more extensive numerical simulations to rigorously test and revise the conditions of the optimal pulse width, which would reveal the dual-peak in the temporal reflectance signals.

This study has been supported by the National Natural Science Foundation of China (nos. 50636010 and 50721005), and the Program of Introducing Talents of Discipline to Universities (“111” project no. B06019), China.