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Researchers have made a significant breakthrough in understanding light localization in three-dimensional structures by confirming Anderson localization of light in random packings of metallic spheres. This discovery addresses a longstanding puzzle—whether optical waves could be trapped in such configurations. Utilizing advanced computing capabilities, the team, led by Professor Hui Cao, demonstrated the localization of electromagnetic waves, paving the way for innovations in lasers and photocatalysts.
Anderson localization, first introduced by Philip W. Anderson in 1958, involves determining how defects in materials can affect the movement of electrons. While previous experiments suggested the possibility of light localization in three dimensions, results often faced scrutiny due to potential experimental artifacts. The research team overcame challenges in simulating these complex systems by collaborating with Flexcompute, utilizing advanced numerical simulations that drastically accelerated computation time.
Key findings revealed that light cannot be localized in three-dimensional structures made from dielectric materials such as glass, explaining past failures. In contrast, they presented clear evidence of light localization in metallic spheres, a surprising result given metals’ light absorption properties. This research not only resolves longstanding questions but also opens avenues for applications in various optical technologies. The results were published in Nature Physics.
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