Reducing Energy Loss in Metal Nanostructures



 City University in Hong Kong is studying the reduction of energy loss in metal nanostructures. By changing the dimensions of these structures, the scientists have unlocked their full potential. This study and research paves the way for more efficient and powerful nanoscale optical devices.

Dr. Liang Yao is from the Department of Electrical Engineering at City UHK. He is the first author of this research. The paper is titled, "From Local to Nonlocal High-Quality Plasmonic Metasurfaces." It was published in the journal Physical Review Letters. Yao reports, " This breakthrough resolves the longstanding issue of energy loss, allowing for high-performance nanoscale optical devices."

There is a universal rule that has been discovered. It is called the inverse square root law. It shows how changing the dimensions of the plasmonic nanostructures can greatly reduce energy loss. The study relates localized surface plasmon resonances (LSPRs) and surface plasmon polaritons (SPPs). 

This relationship results in double the improvement in resonance quality in metal arrays. The relationship between high-loss localized surface plasmon resonances (LSPR) with low-loss surface plasmon polaritons (SPP) was totally challenging to the team.

This discovery has the ability to revolutionize several fields, including sensing, imaging and solar energy. With this new research, scientists will discover even more powerful optical devices.

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