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Updated: Feb 17, 2026
10:54
Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters
Published on: July 8, 2013
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Lattice-induced modulators at terahertz frequencies
Optics Letters
|December 8, 2017
Summary
Researchers studied split-ring resonators (SRRs) up to 10 terahertz, identifying higher-order modes. They demonstrated control over resonance quality factors and proposed novel optical switching and modulation devices.
Area of Science:
- Terahertz (THz) photonics
- Metamaterials and nanophotonics
- Plasmonics and lattice dynamics
Background:
- Split-ring resonators (SRRs) are key metamaterials for manipulating electromagnetic waves.
- Understanding higher-order modes in SRR arrays is crucial for advanced THz applications.
- Lattice-plasmon coupling influences the resonant properties of metamaterial arrays.
Purpose of the Study:
- To measure and analyze the transmission spectra of SRR arrays up to 10 THz.
- To investigate higher-order lattice and plasmon modes and their dispersion relations.
- To demonstrate tunability of resonance quality factors and propose novel THz devices.
Main Methods:
- Experimental measurement of transmission spectra for parallel and perpendicular polarizations.
- Theoretical calculations of lattice and plasmon mode dispersion relations.
- Electromagnetic simulations to validate mode identification and coupling effects.
Main Results:
- Confirmed the presence of multiple higher-order lattice and plasmon modes in SRR arrays.
- Demonstrated modulation of higher-order plasmon resonance quality factors by altering array periodicity.
- Showcased the potential for creating single-frequency switches and broadband modulators.
Conclusions:
- Higher-order modes in SRR arrays can be precisely controlled.
- Modulating lattice-plasmon coupling offers a pathway to tune metamaterial properties.
- Proposed devices show promise for active control in THz frequency applications.
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