Related Experiment Video
Updated: May 20, 2026
07:39
Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
Published on: July 21, 2018
Measurement of surface plasmon correlation length differences using Fibonacci deterministic hole arrays
Tho Duc Nguyen1, Ajay Nahata, Z Valy Vardeny
1Department of Physics, University of Utah, Salt Lake City, Utah 84112, USA.
Optics Express
|July 10, 2012
Summary
Terahertz (THz) transmission measurements reveal that surface plasmon-polariton (SPP) correlation lengths in Fibonacci hole arrays are smaller than in periodic ones. This leads to weaker Fibonacci-related resonances compared to periodic hole arrays (HA).
Area of Science:
- Physics
- Materials Science
- Nanotechnology
Background:
- Subwavelength hole arrays exhibit unique electromagnetic properties.
- Surface plasmon-polaritons (SPPs) play a crucial role in light-matter interactions at subwavelength scales.
- Aperiodic structures, like Fibonacci arrays, offer novel ways to control wave phenomena.
Purpose of the Study:
- To investigate terahertz (THz) transmission through 2D Fibonacci deterministic subwavelength hole arrays.
- To compare the surface plasmon-polariton (SPP) correlation lengths and resonance strengths of Fibonacci and periodic hole arrays (HA).
- To understand the origin of Fano-type resonances in these aperiodic structures.
Main Methods:
- Terahertz (THz) transmission measurements were performed on 2D Fibonacci and periodic subwavelength hole arrays in metal foils.
- Analysis of enhanced transmission spectra to identify Fano-type resonances.
- Comparison of resonance strengths and correlation lengths between Fibonacci and periodic HA structures.
- Investigation of the relationship between transmission minima and reciprocal vectors of the HA structure factor.
Main Results:
- SPP correlation lengths for aperiodic Fibonacci resonances are smaller than those of the underlying grid.
- Two groups of Fano-type resonances were observed: Fibonacci-related and grid-related.
- Fibonacci-related transmission resonances are significantly weaker than predicted by Fourier intensity and grid-related resonances.
- Fibonacci HA resonance strengths are an order of magnitude weaker than periodic HA, correlating with smaller SPP correlation lengths.
Conclusions:
- The weaker Fibonacci-related resonances are attributed to complex, multi-fractal dispersion relations and scattering from the underlying grid.
- The study highlights the distinct electromagnetic behavior of aperiodic Fibonacci structures compared to periodic ones.
- Findings suggest that Fibonacci arrays exhibit reduced SPP correlation, impacting their resonance characteristics in THz transmission.
