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Paper detail

Degenerate Distributed Feedback Photonic Structure with Double Grating Exhibiting Degenerate Band Edge

We propose a degenerate version of the Bragg condition, associated to a degenerate band edge (DBE). A standard Bragg condition can be implemented using a periodic grating that operates at the regular band edge. The structure we propose to realize a DBE is made of two stacked identical gratings that form two coupled periodic waveguides with broken mirror symmetry. The occurrence of the DBE is verified by using both an eigenmode solver and the calculations of scattering parameters, using full-wave simulations. The proposed structure is a good candidate to conceive a degenerate distributed feedback lasers operating at the DBE.

preprint2022arXivOpen access
Tarek MealyFilippo Capolino
physics.optics
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Tarek MealyFilippo Capolino

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