Study of Acoustic Graphene Plasmons Heralds Improvements for Optoelectronics

Researchers from Korea Advanced Institute of Science and Technology (KAIST), with domestic and international collaborators, demonstrated direct near-field optical imaging of acoustic graphene plasmon (AGP) fields, using a sensitive scattering-type scanning near-field optical microscope (s-SNOM) to directly measure the optical fields of the AGP waves propagating in a nanometer-thin waveguide. The method enabled the scientists to visualize thousandfold compression of mid-infrared light. The strategy, they said, paves the way for potential breakthroughs in the practical application of acoustic graphene plasmon platforms for next-generation, high-performance, graphene-based optoelectronic devices with enhanced light-matter interactions...