Abstract

Plasmonic structures made of periodically arranged metallic rings integrated into subwavelength holes are investigated at the far-infrared terahertz frequencies. The emergence and the interplay of various resonances sustained by such plasmonic samples are elucidated. To reveal a coherent physical picture, relevant dimensions of the samples are modified and their impact on the resonance properties is analyzed. The experimental work is fully supported by numerical simulations. The understanding of the interplay of various resonances will foster applications which require plasmonic substrates to exhibit simultaneously resonances at well-defined frequencies and line widths.

©2012 Optical Society of America

Nanostructures for surface plasmons

Junxi Zhang and Lide Zhang
Adv. Opt. Photon. 4(2) 157-321 (2012)

Designing surface plasmon resonance of subwavelength hole arrays by studying absorption

Lin Wu, Ping Bai, and Er Ping Li
J. Opt. Soc. Am. B 29(4) 521-528 (2012)

Measurement of surface plasmon correlation length differences using Fibonacci deterministic hole arrays

Tho Duc Nguyen, Ajay Nahata, and Z. Valy Vardeny
Opt. Express 20(14) 15222-15231 (2012)

Optical properties of semiconductor superlattices in the far infrared

T. Dumelow and D. R. Tilley
J. Opt. Soc. Am. A 10(4) 633-645 (1993)

Plasmonic resonances in diffractive arrays of gold nanoantennas: near and far field effects

Andrey G. Nikitin, Andrei V. Kabashin, and Hervé Dallaporta
Opt. Express 20(25) 27941-27952 (2012)