Active loaded plasmonic antennas at terahertz frequencies: Optical control of their capacitive-inductive coupling

G. Georgiou, C. Tserkezis, M. C. Schaafsma, J. Aizpurua, and J. Gómez Rivas
Phys. Rev. B 91, 125443 – Published 31 March 2015
PDFHTMLExport Citation

Abstract

We demonstrate the photogeneration of loaded dipole plasmonic antennas resonating at THz frequencies. This is achieved by the patterned optical illumination of a semiconductor surface using a spatial light modulator. Our experimental results indicate the existence of capacitive and inductive coupling of localized surface plasmon polaritons. By varying the load in the antenna gap we are able to switch between both coupling regimes. Furthermore, we determine experimentally the effective impedance of the antenna load and verify that this load can be effectively expressed as a LC resonance formed by a THz inductor and capacitor connected in a parallel circuit configuration. These findings are theoretically supported by full electrodynamic calculations and by simple concepts of lumped circuit theory. Our results open new possibilities for the design of active THz circuits for optoelectronic devices.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Received 6 January 2015
  • Revised 19 February 2015

DOI:https://doi.org/10.1103/PhysRevB.91.125443

©2015 American Physical Society

Authors & Affiliations

G. Georgiou1,*, C. Tserkezis2, M. C. Schaafsma1, J. Aizpurua2, and J. Gómez Rivas1,3,†

  • 1Center for Nanophotonics, FOM Institute AMOLF, Science Park 104, 1098 XG, Amsterdam, The Netherlands
  • 2Donostia International Physics Center (DIPC) and Centro de Física de Materiales (CFM) CSIC-UPV/EHU, Paseo Manuel de Lardizabal 4, Donostia-San Sebastián 20018, Spain
  • 3COBRA Research Institute, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands

  • *georgiou@amolf.nl
  • rivas@amolf.nl

Article Text (Subscription Required)

Click to Expand

Supplemental Material (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 91, Iss. 12 — 15 March 2015

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review B

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×