Path-integral treatment of optical and microwave tunneling

A model based on a statistical method, as deduced from a path-integral treatment of the Brownian motion early proposed by Feynman and Hibbs in 1965, demonstrates to be capable of interpreting the results of delay time measurements in FTIR experiments at optical and microwave scale. A plausible description of the trajectories followed by the system inside the tunneling region, the air gap between the two dielectric prisms, is given.