DNA-Assembled Plasmonic Waveguides for Nanoscale Light Propagation to a Fluorescent Nanodiamond

Guer FN, Mcpolin CPT, Raza S, Mayer M, Roth DJ, Steiner AM, Loeffler M, Fery A, Brongersma ML, Zayats AV, Koenig TAF, Schmidt TL (2018)

Publication Type: Journal article

Publication year: 2018

Journal

Nano Letters American Chemical Society

Book Volume: 18

Pages Range: 7323-7329

Journal Issue: 11

DOI: 10.1021/acs.nanolett.8b03524

Abstract

Plasmonic waveguides consisting of metal nanoparticle chains can localize and guide light well below the diffraction limit, but high propagation losses due to lithography-limited large interparticle spacing have impeded practical applications. Here, we demonstrate that DNA-origami-based self-assembly of monocrystalline gold nanoparticles allows the interparticle spacing to be decreased to ∼2 nm, thus reducing propagation losses to 0.8 dB per 50 nm at a deep subwavelength confinement of 62 nm (∼ /10). We characterize the individual waveguides with nanometer-scale resolution by electron energy-loss spectroscopy. Light propagation toward a fluorescent nanodiamond is directly visualized by cathodoluminescence imaging spectroscopy on a single-device level, thereby realizing nanoscale light manipulation and energy conversion. Simulations suggest that longitudinal plasmon modes arising from the narrow gaps are responsible for the efficient waveguiding. With this scalable DNA origami approach, micrometer-long propagation lengths could be achieved, enabling applications in information technology, sensing, and quantum optics.

Involved external institutions

Technische Universität Dresden DE Germany (DE) King’s College London GB United Kingdom (GB) Stanford University US United States (USA) (US)

How to cite

APA:

Guer, F.N., Mcpolin, C.P.T., Raza, S., Mayer, M., Roth, D.J., Steiner, A.M.,... Schmidt, T.L. (2018). DNA-Assembled Plasmonic Waveguides for Nanoscale Light Propagation to a Fluorescent Nanodiamond. Nano Letters, 18(11), 7323-7329. https://doi.org/10.1021/acs.nanolett.8b03524

MLA:

Guer, Fatih N., et al. "DNA-Assembled Plasmonic Waveguides for Nanoscale Light Propagation to a Fluorescent Nanodiamond." Nano Letters 18.11 (2018): 7323-7329.

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