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We discovered a strict connection between one-sided reflectionless (ORL) and coherent perfect absorption (CPA) phenomena in optical experiments. This link is observed in lossy atomic photonic crystals and is expected in non-Hermitian optical systems.

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Area of Science:

  • * Photonics and Wave Scattering
  • * Non-Hermitian Optics
  • * Quantum Optics

Background:

  • * One-sided reflectionless (ORL) and coherent perfect absorption (CPA) are distinct, unusual scattering phenomena in optical experiments.
  • * These phenomena have significant fundamental and practical implications but have been studied separately.
  • * Understanding their relationship is crucial for advancing optical metamaterials and devices.

Purpose of the Study:

  • * To establish and demonstrate a strict connection between ORL and CPA phenomena.
  • * To investigate this connection within realistic optical systems, specifically lossy atomic photonic crystals.
  • * To explore the general applicability of this connection in non-Hermitian optical media.

Main Methods:

  • * Theoretical analysis of wave scattering in a 3D parameter space of a lossy atomic photonic crystal.
  • * Identification of parameter regimes where CPA and ORL phenomena coexist or are linked.
  • * Mathematical modeling to demonstrate the transition between CPA and ORL states.

Main Results:

  • * A direct connection between CPA and ORL states was proven to exist.
  • * This connection is observed between specific parameter pairs in lossy atomic photonic crystals.
  • * The CPA-ORL link is shown to be a generic feature in non-Hermitian optical media.

Conclusions:

  • * CPA and ORL are not independent phenomena but are intrinsically linked.
  • * The discovered connection provides new insights into wave scattering in non-Hermitian systems.
  • * This finding has potential applications in designing novel optical devices with tailored absorption and reflection properties.