Probing the dynamics of microwave pulses in 1D disordered waveguides

摘要

We report simulations of the time evolution of microwave pulses inside a 1D random waveguide made of alternating dielectric slabs A or B. Randomness is either introduced by randomly juxtaposing slabs A or B in between the alternating slabs or by introducing a random thickness on each layer. Simulations are performed on a particular random configuration or on a high number of configurations. Microwave pulses play the role of a probe and allow the study of the dynamics of localized modes and extended modes in random waveguides in terms of dwell time of the energy in the sample. This work highlights the diversity of dynamical phenomena arising in single realizations of random configuration when those phenomena are hidden by large ensemble averages.