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Park SM, Lee KS, Kim JH, et al. Direct Visualization of Gap-Plasmon Propagation on a Near-Touching Nanowire Dimer. J Phys Chem Lett. 2020;11(21):9313-9320doi: 10.1021/acs.jpclett.0c02494.
Park, S. M., Lee, K. S., Kim, J. H., Yeon, G. J., Shin, H. H., Park, S., & Kim, Z. H. (2020). Direct Visualization of Gap-Plasmon Propagation on a Near-Touching Nanowire Dimer. The journal of physical chemistry letters, 11(21), 9313-9320. https://doi.org/10.1021/acs.jpclett.0c02494
Park, Sang-Min, et al. "Direct Visualization of Gap-Plasmon Propagation on a Near-Touching Nanowire Dimer." The journal of physical chemistry letters vol. 11,21 (2020): 9313-9320. doi: https://doi.org/10.1021/acs.jpclett.0c02494
Park SM, Lee KS, Kim JH, Yeon GJ, Shin HH, Park S, Kim ZH. Direct Visualization of Gap-Plasmon Propagation on a Near-Touching Nanowire Dimer. J Phys Chem Lett. 2020 Nov 05;11(21):9313-9320. doi: 10.1021/acs.jpclett.0c02494. Epub 2020 Oct 22. PMID: 33089991.
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J Phys Chem Lett. 2020 Nov 05;11(21):9313-9320. doi: 10.1021/acs.jpclett.0c02494. Epub 2020 Oct 22.

Direct Visualization of Gap-Plasmon Propagation on a Near-Touching Nanowire Dimer.

The journal of physical chemistry letters

Sang-Min Park, Kang Sup Lee, Jin-Ho Kim, Gyu Jin Yeon, Hyun-Hang Shin, Sangwon Park, Zee Hwan Kim

Affiliations

  1. Department of Chemistry, Seoul National University, Seoul 08826, Korea.
  2. Department of Physics and Astronomy, Seoul National University, Seoul 08826, Korea.
  3. Department of Biophysics and Chemical Biology, Seoul National University, Seoul 08826, Korea.

PMID: 33089991 DOI: 10.1021/acs.jpclett.0c02494

Abstract

Dimers of metallic nanowires (NWs) with nanometric gaps could be an alternative to overcome the limitations of existing plasmonic waveguides. The gap-surface plasmon polaritons (gap-SPPs) of the dimers may propagate along the NW without crosstalk and greatly enhance the coupling efficiency with an emitter, enabling ultracompact optical circuits. Such a possibility has not been realized, and we experimentally show its possibility. The gap-SPPs of the AgNW-molecule-AgNW structure, with a gap of 3-5 nm defined by the molecules, are visualized using the surface-enhanced Raman scattering (SERS) of the molecules. The SERS images, representing the gap-field intensity distribution, reveal the decay and beating of the monopole-monopole and dipole-dipole gap modes. The propagation lengths of the two (

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