Electro-plasmonic nanoantenna: A nonfluorescent optical probe for ultrasensitive label-free detection of electrophysiological signals.

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ID: 66607
2019
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Abstract
Harnessing the unprecedented spatiotemporal resolution capability of light to detect electrophysiological signals has been the goal of scientists for nearly 50 years. Yet, progress toward that goal remains elusive due to lack of electro-optic translators that can efficiently convert electrical activity to high photon count optical signals. Here, we introduce an ultrasensitive and extremely bright nanoscale electric-field probe overcoming the low photon count limitations of existing optical field reporters. Our electro-plasmonic nanoantennas with drastically enhanced cross sections (~10 nm compared to typical values of ~10 nm for voltage-sensitive fluorescence dyes and ~1 nm for quantum dots) offer reliable detection of local electric-field dynamics with remarkably high sensitivities and signal-to-shot noise ratios (~60 to 220) from diffraction-limited spots. In our electro-optics experiments, we demonstrate high-temporal resolution electric-field measurements at kilohertz frequencies and achieved label-free optical recording of network-level electrogenic activity of cardiomyocyte cells with low-intensity light (11 mW/mm).
Reference Key
habib2019electroplasmonicscience Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Habib, Ahsan;Zhu, Xiangchao;Can, Uryan I;McLanahan, Maverick L;Zorlutuna, Pinar;Yanik, Ahmet A;
Journal Science advances
Year 2019
DOI
10.1126/sciadv.aav9786
URL
Keywords
terahertz metamaterial absorber nanoantenna ohmic absorption

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