Experimental evidence of enhanced broadband transmission in disordered systems with mirror symmetry

TL;DR

This study demonstrates that mirror symmetry in disordered systems significantly enhances broadband transmission, with effects tunable by disorder degree and scatterer placement, revealing the role of symmetry and disorder correlation.

Contribution

It provides experimental evidence that mirror symmetry and disorder correlation can be used to control and enhance broadband transmission in complex systems.

Findings

Mirror symmetry causes broadband transmission enhancement.

Displacing the barrier from the cavity center affects conductance.

Symmetrically placed scatterers further increase conductance.

Abstract

We demonstrate in microwave measurements the broadband enhancement of transmission through an opaque barrier due to mirror symmetry. This enhancement relies on constructive interference between mirror scattering paths resulting from strong internal reflections at the left and right interfaces of a multichannel cavity. We observe a strong sensitivity of the conductance to a shift of the barrier from the center of the cavity. Remarkably, the impact of mirror symmetry can be further increased by tuning the degree of disorder within the cavity. We report an additional enhancement of the conductance found by symmetrically placing randomly located scatterers. Our results illuminate the impact of symmetry and disorder correlation on transmission through complex systems.