Tunable unidirectional reflection in cold atoms based on spatial Kramers-Kronig modulation

Yan Zhang; Jin-Hui Wu; M. Artoni; G. C. La Rocca

doi:10.1117/12.2574372

10 October 2020 Tunable unidirectional reflection in cold atoms based on spatial Kramers-Kronig modulation

Yan Zhang, Jin-Hui Wu, M. Artoni, G. C. La Rocca

Proceedings Volume 11558, Quantum and Nonlinear Optics VII; 115580I (2020) https://doi.org/10.1117/12.2574372
Event: SPIE/COS Photonics Asia, 2020, Online Only

Abstract

We propose a scheme for realizing spatial Kramers-Kronig (KK) relation of probe susceptibility in a cold atomic sample driven by a linearly modulated control field. The sample is found to exhibit broken, transitional, and unbroken regimes, where the non-Hermitian KK relation is well satisfied, foreshortened, and fully destroyed in order. The unbroken and transitional regimes are of special interest because they allow unidirectional reflection at one and both sample ends, respectively. Bragg scattering can also be incorporated into spatial KK relation to largely enhance the nonzero reflectivity, leading thus to a high forward-backward reflectivity contrast.

Conference Presentation

Citation Download Citation

Yan Zhang, Jin-Hui Wu, M. Artoni, and G. C. La Rocca "Tunable unidirectional reflection in cold atoms based on spatial Kramers-Kronig modulation", Proc. SPIE 11558, Quantum and Nonlinear Optics VII, 115580I (10 October 2020); https://doi.org/10.1117/12.2574372

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