Probing Gap Plasmons Down to Subnanometer Scales Using Collapsible Nanofingers
Source abstract
Abstract
Gap plasmonic nanostructures are of great interest due to their ability to concentrate light into small volumes. Theoretical studies, considering quantum mechanical effects, have predicted the optimal spatial gap between adjacent nanoparticles to be in the subnanometer regime in order to achieve the strongest possible field enhancement. Here, we present a technology to fabricate gap plasmonic structures with subnanometer resolution, high reliability, and high throughput using collapsible nanofingers. This approach enables us to systematically investigate the effects of gap size and tunneling barrier height. The experimental results are consistent with previous findings as well as with a straightforward theoretical model that is presented here.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Plasmonic and Surface Plasmon Research · Gold and Silver Nanoparticles Synthesis and Applications · Orbital Angular Momentum in Optics
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Ming Hsieh Department of Electrical Engineering, University of Southern California, Los Angeles, California 90089, United States
Department of Physics and Astronomy, University of Southern California, Los Angeles, California 90089, United States
Department of Applied Physics, Zhejiang University of Technology, Hangzhou, Zhejiang 310023, China
Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
Funding
Air Force Office of Scientific Research · U.S. Department of Energy · Division of Civil, Mechanical and Manufacturing Innovation · National Natural Science Foundation of China · Natural Science Foundation of Zhejiang Province
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