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Electromagnetic (EM) radiation consists of electric and magnetic field components oscillating in planes perpendicular to each other and mutually perpendicular to radiation propagation through space. EM radiation can be classified as a wave, characterized by the properties of waves such as wavelength (denoted as λ) and frequency (represented by ν).
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Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
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Many-Body Subradiant Excitations in Metamaterial Arrays: Experiment and Theory.

Stewart D Jenkins1, Janne Ruostekoski1, Nikitas Papasimakis2

  • 1Mathematical Sciences and Centre for Photonic Metamaterials, University of Southampton, Southampton SO17 1BJ, United Kingdom.

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Researchers engineered classical subradiance in metamaterial arrays, overcoming challenges in controlling weak radiative coupling. This work demonstrates spatially extended, many-body subradiant states in classical systems and plasmonic metamaterials.

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Area of Science:

  • Quantum optics
  • Condensed matter physics
  • Metamaterials

Background:

  • Subradiant excitations, predicted by Dicke, exhibit weak coupling to their environment, posing a significant challenge in physics.
  • Controlling and observing subradiant states in classical systems has been difficult due to their elusive nature.

Purpose of the Study:

  • To engineer and demonstrate massive, coherently driven classical subradiance in planar metamaterial arrays.
  • To investigate the properties of spatially extended eigenmodes in large-scale metamaterial systems.
  • To explore the existence of similar subradiant phenomena in plasmonic metamaterials at optical frequencies.

Main Methods:

  • Engineering planar metamaterial arrays with over 1000 metamolecules.
  • Utilizing large-scale numerical simulations to model near- and far-field responses.
  • Comparing simulation results with experimental observations.

Main Results:

  • Successful engineering of massive, coherently driven classical subradiance.
  • Identification of strong evidence for classically correlated multimetamolecule subradiant states.
  • Demonstration that these subradiant states dominate the total excitation energy.
  • Evidence for spatially extended many-body subradiance in plasmonic metamaterial arrays at optical frequencies.

Conclusions:

  • Classical subradiance can be engineered and controlled in large-scale metamaterial systems.
  • Spatially extended, many-body subradiant states are a key feature of these engineered systems.
  • The findings suggest potential applications in metamaterials and plasmonics for manipulating light-matter interactions.