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Non-Hermitian systems can control light dissipation for applications like enhanced optical sensors. Researchers demonstrated a photonic lattice exhibiting the non-Hermitian skin effect, creating a light funnel by localizing all modes at an interface.

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Area of Science:

  • Photonics
  • Topological Physics
  • Quantum Optics

Background:

  • Dissipation is inherent in non-Hermitian systems.
  • Non-Hermiticity offers opportunities for advanced applications, including sensitive optical sensors.
  • Tailoring non-Hermiticity enables precise control over system behavior.

Purpose of the Study:

  • To implement and investigate a non-Hermitian photonic mesh lattice.
  • To explore the phenomenon of the non-Hermitian skin effect in photonic systems.
  • To demonstrate a novel light funnel based on topological properties.

Main Methods:

  • Implementation of a non-Hermitian photonic mesh lattice.
  • Tailoring the anisotropy of nearest-neighbor coupling.
  • Analysis of eigenmode spectrum and light field propagation.

Main Results:

  • An interface in the lattice caused a complete collapse of the eigenmode spectrum.
  • All modes exhibited exponential localization at the interface, a phenomenon known as the non-Hermitian skin effect.
  • Light fields were directed towards the interface irrespective of their initial shape or position.

Conclusions:

  • The non-Hermitian skin effect can be harnessed for topological phenomena in photonics.
  • A highly efficient light funnel was demonstrated using this effect.
  • Controlled dissipation in non-Hermitian systems opens avenues for advanced photonic devices.