Plasmonic nanoantenna hydrophones

Article English OPEN
Maksymov, Ivan S. ; Greentree, Andrew D. (2016)
  • Publisher: Nature Publishing Group
  • Journal: Scientific Reports, volume 6 (issn: 2045-2322, eissn: 2045-2322)
  • Related identifiers: pmc: PMC5017197, doi: 10.1038/srep32892
  • Subject: Article
    arxiv: Physics::Optics | Quantitative Biology::Tissues and Organs | Physics::Medical Physics
    mesheuropmc: technology, industry, and agriculture

Ultrasound is a valuable biomedical imaging modality and diagnostic tool. Here we theoretically demonstrate that a single dipole plasmonic nanoantenna can be used as an optical hydrophone for MHz-range ultrasound. The nanoantenna is tuned to operate on a high-order plasmon mode, which provides an increased sensitivity to ultrasound in contrast to the usual approach of using the fundamental dipolar plasmon resonance. Plasmonic nanoantenna hydrophones may be useful for ultrasonic imaging of biological cells, cancer tissues or small blood vessels, as well as for Brillouin spectroscopy at the nanoscale.
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