These numerical simulations put an end to the longstanding question in condensed matter physics: Can 3D Anderson localization of electromagnetic waves be achieved?
In a press release, Cao said, "It's amazing how fast the Flexcompute numerical solver runs. Some simulations that we expect would take days to do, it can do in just 30 minutes. This allows us to simulate many different random configurations, different system sizes, and different structural parameters to see whether we can get three-dimensional localization of light."
They first showed that the localization of 3D random aggregates of particles made of dielectric materials, such as glass or silicon, is impossible. This explained why previous experiments failed to demonstrate 3D Anderson localization. Despite the absorption of light in metallic systems, which has historically led to their relative neglect, the study demonstrates the persistence of Anderson localization in these systems. The researchers observed evidence of Anderson localization even when considering the inherent light absorption of common metals like aluminum, silver, and copper.
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