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Tailoring Spectral Properties of Binary PT-Symmetric Gratings by Duty-Cycle Methods

Abstract : We explore the frequency selective functionalities of a nonuniform PT-symmetric Bragg grating with modulated complex index profile. We start by assessing the possibility to achieve an efficient apodization of the PT-symmetric Bragg grating spectral response by using direct adaptations of the conventional apodization techniques. A particular emphasis is put on the binary type structures with different duty cycle variations. We subsequently propose a new efficient grating modulation technique allowing for largely improved reflection/transmission characteristics of the Bragg gratings. The overall intention of our approach is to adapt conventional Bragg gratings designs to improve a PT-symmetric case, fostering thus a new generation of active photonic devices.
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Anatole Lupu, H. Benisty, Andrei V. Lavrinenko. Tailoring Spectral Properties of Binary PT-Symmetric Gratings by Duty-Cycle Methods. IEEE Journal of Selected Topics in Quantum Electronics, Institute of Electrical and Electronics Engineers, 2016, 22 (5), pp.4402807. ⟨10.1109/JSTQE.2016.2542791⟩. ⟨hal-01698888⟩



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