Graphene–silver–silicon carbide platform achieves record phononic quantum interference for molecular sensing

Researchers at the University of California, University of North Texas, Pennsylvania State University, National Institute of Standards and Technology and Rice University have demonstrated a strong form of interference between phonons – the vibrations in a material’s structure that constitute the tiniest units, or quanta, of heat or sound in that system. The phenomenon where two phonons with different frequency distributions interfere with each other, known as Fano resonance, was two orders of magnitude greater than any previously reported.

A rendering of a two-dimensional metal (middle layer) intercalated between a layer of graphene (top) and silicon carbide (bottom). Image credit: Rice University

Just as overlapping ripples on a pond can amplify or cancel each other out, waves of many kinds — including light, sound and atomic vibrations — can interfere with one another. At the quantum level, this kind of interference powers high-precision sensors and could be harnessed for quantum computing.

A rendering of a two-dimensional metal (middle layer) intercalated between a layer of graphene (top) and silicon carbide (bottom). Image credit: Rice UniversityJust as overlapping ripples on a pond can amplify or cancel each other out, waves of many kinds — including light, sound and atomic vibrations — can interfere with one another. At the quantum level, this kind of interference powers high-precision sensors and could be harnessed for quantum computing.

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​Graphene–silver–silicon carbide platform achieves record phononic quantum interference for molecular sensing

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Graphene–silver–silicon carbide platform achieves record phononic quantum interference for molecular sensing