Controlling terahertz radiation with nanoscale metal barriers embedded in nano slot antennas

Hyeong Ryeol Park, Young Mi Bahk, Kwang Jun Ahn, Q. Han Park, Dai Sik Kim, Luis Martín-Moreno, Francisco J. García-Vidal, Jorge Bravo-Abad

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

Nanoscale metallic barriers embedded in terahertz (THz) slot antennas are shown to provide unprecedented control of the transition state arising at the crossover between the full- and half-wavelength resonant modes of such antennas. We demonstrate strong near-field coupling between two paired THz slot antennas separated by a 5 nm wide nanobarrier, almost fully inducing the shift to the resonance of the double-length slot antenna. This increases by a factor of 50 the length-scale needed to observe similar coupling strengths in conventional air-gap antennas (around 0.1 nm), making the transition state readily accessible to experiment. Our measurements are in good agreement with a quantitative theoretical modeling, which also provides a simple physical picture of our observations.

Original languageEnglish
Pages (from-to)8340-8345
Number of pages6
JournalACS nano
Volume5
Issue number10
DOIs
Publication statusPublished - 2011 Oct 25

Keywords

  • nanoparticle detection
  • paired antenna
  • subskin depth barrier
  • terahertz nano slot antenna
  • terahertz spectroscopy

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Controlling terahertz radiation with nanoscale metal barriers embedded in nano slot antennas'. Together they form a unique fingerprint.

  • Cite this

    Park, H. R., Bahk, Y. M., Ahn, K. J., Park, Q. H., Kim, D. S., Martín-Moreno, L., García-Vidal, F. J., & Bravo-Abad, J. (2011). Controlling terahertz radiation with nanoscale metal barriers embedded in nano slot antennas. ACS nano, 5(10), 8340-8345. https://doi.org/10.1021/nn2031885