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Perturbation approach for the control of the quality factor in photonic crystal membranes: Application to selective absorbers

Cédric Blanchard 1 Pierre Viktorovitch 1 Xavier Letartre 1 
1 INL - Photonique - INL - Nanophotonique
INL - Institut des Nanotechnologies de Lyon
Abstract : Above the light line, guided modes cannot be perpetually sustained into a photonic crystal membrane owing to its periodic modulation. The resulting leaky waves are nowadays largely exploited in the context of integrated optics. We develop here a model affording insight into the mechanism that allows the obtention of resonances endowed with extremely high quality factors. As a matter of fact, the model indicates that the quality factor can take arbitrarily high values and that this phenomenon results from the coupling between guided and radiated modes. The obtained tight control over the emission spectrum of a photonic crystal membrane is employed to design a spectrally and spatially selective absorber.
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Cédric Blanchard, Pierre Viktorovitch, Xavier Letartre. Perturbation approach for the control of the quality factor in photonic crystal membranes: Application to selective absorbers. Physical Review A, American Physical Society 2014, 90, pp.033824. ⟨10.1103/PhysRevA.90.033824⟩. ⟨hal-01489891⟩

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