Coherent virtual absorption for discretized light
arXiv:1803.09969 · doi:10.1364/OL.43.002122
Abstract
Coherent virtual absorption (CVA) is a recently-introduced phenomenon for which exponentially growing waves incident onto a conservative optical medium are neither reflected nor transmitted, at least transiently. CVA has been associated to complex zeros of the scattering matrix and can be regarded as the time reversal of the decay process of a quasi-mode sustained by the optical medium. Here we consider CVA for discretized light transport in coupled resonator optical waveguides or waveguide arrays and show that a distinct kind of CVA, which is not related to complex zero excitation of quasi-modes, can be observed. This result suggests that scattering matrix analysis can not fully capture CVA phenomena.
arXiv comment5 pages, 4 figures, to appear in Optics Letters
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- Virtual perfect absorption in resonant media and their PT-symmetric generalizations
- A universal form of arrays with spectral singularities
- Tunable Localization of Light Using Nested Invisible Metasurface Cavities