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Journal Articles Photonics research Year : 2022

Imaging lattice switching with Talbot effect in reconfigurable non-Hermitian photonic graphene

Abstract

By taking advantage of the optical induction method, a non-Hermitian photonic graphene lattice is efficiently established inside an atomic vapor cell under the condition of electromagnetically induced transparency. This non-Hermitian structure is accomplished by simultaneously modulating both the real and imaginary components of the refractive index into honeycomb profiles. The transmitted probe field can either exhibit a hexagonal or honeycomb intensity profile when the degree of non-Hermiticity is effectively controlled by the ratio between imaginary and real indices. The experimental realization of such an instantaneously tunable complex honeycomb potential sets a new platform for future experimental exploration of non-Hermitian topological photonics. Also, we demonstrate the Talbot effect of the transmitted probe patterns. Such a self-imaging effect based on a non-Hermitian structure provides a promising route to potentially improve the related applications, such as an all-optical-controllable Talbot–Lau interferometer.
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hal-03705423 , version 1 (05-07-2022)

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Zhaoyang Zhang, Yuan Feng, Shaohuan Ning, Guillaume Malpuech, Dmitry Solnyshkov, et al.. Imaging lattice switching with Talbot effect in reconfigurable non-Hermitian photonic graphene. Photonics research, 2022, 10 (4), pp.958. ⟨10.1364/PRJ.447404⟩. ⟨hal-03705423⟩
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