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    Coherent virtual absorption (CVA) in discretized light transport shows a new type not linked to quasi-modes. This suggests scattering matrix analysis may not fully explain all CVA phenomena.

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    Area of Science:

    • Photonics and optical physics.
    • Wave propagation in structured media.

    Background:

    • Coherent virtual absorption (CVA) is a phenomenon where growing waves in conservative media are not reflected or transmitted.
    • CVA is typically linked to complex zeros of the scattering matrix and time-reversed quasi-mode decay.

    Purpose of the Study:

    • To investigate CVA in discretized light transport systems, specifically coupled resonator optical waveguides and waveguide arrays.
    • To determine if CVA in these systems is exclusively related to quasi-mode excitation.

    Main Methods:

    • Analysis of light transport in coupled resonator optical waveguides and waveguide arrays.
    • Theoretical investigation of coherent virtual absorption phenomena.
    • Examination of scattering matrix properties in discretized optical systems.

    Main Results:

    • A distinct form of CVA was observed in discretized light transport.
    • This newly identified CVA is not associated with the excitation of quasi-modes via complex zeros.
    • The findings indicate limitations of scattering matrix analysis for certain CVA phenomena.

    Conclusions:

    • Discretized light transport exhibits novel CVA behaviors beyond quasi-mode dynamics.
    • Scattering matrix theory alone may be insufficient to fully describe all CVA manifestations.
    • Further research is needed to understand the underlying mechanisms of this distinct CVA.