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

TY - JOUR

T1 - DNA-Assembled Plasmonic Waveguides for Nanoscale Light Propagation to a Fluorescent Nanodiamond

AU - Gür, Fatih N.

AU - McPolin, Cillian P.T.

AU - Raza, Søren

AU - Mayer, Martin

AU - Roth, Diane J.

AU - Steiner, Anja Maria

AU - Löffler, Markus

AU - Fery, Andreas

AU - Brongersma, Mark L.

AU - Zayats, Anatoly V.

AU - König, Tobias A.F.

AU - Schmidt, Thorsten L.

PY - 2018/11/14

Y1 - 2018/11/14

N2 - 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.

AB - 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.

KW - cathodoluminescence imaging spectroscopy

KW - DNA nanotechnology

KW - electron energy loss spectroscopy

KW - fluorescent nanodiamonds

KW - nanoparticle chain waveguide

KW - plasmonics

UR - http://www.scopus.com/inward/record.url?scp=85055641191&partnerID=8YFLogxK

U2 - 10.1021/acs.nanolett.8b03524

DO - 10.1021/acs.nanolett.8b03524

M3 - Letter

C2 - 30339400

AN - SCOPUS:85055641191

SN - 1530-6984

VL - 18

SP - 7323

EP - 7329

JO - Nano Letters

JF - Nano Letters

IS - 11

ER -