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    Item type:Publication, Access status: without files ,
    Light stopping by reflection from a moving index front
    (2021-05)
    Gaafar, Mahmoud Abdelaziz
    ;
    Holtorf, Jannik
    ;
    Eich, Manfred
    ;
    Petrov, Alexander
    Nonlinearly generated refractive index fronts in waveguides can change the signal frequency and wavenumber leading to the indirect transitions. Here, we discuss how dynamic light stopping and pulse time reversal can be implemented in dispersive waveguides via these transitions. Our scheme, in contrast to previous concepts of light stopping and time reversal, is not limited by a strict phase matching condition and does not require local index variations, thus, can manipulate broadband signals in a single step process. The presented results are experimentally feasible using existing photonic waveguides technologies.
    Publicationtype: Conference Paper
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    Item type:Publication, Access status: with files ,
    Pulse time reversal and stopping by a refractive index front
    (American Institute of Physics (AIP), 2020-08-14)
    Gaafar, Mahmoud Abdelaziz
    ;
    Holtorf, Jannik
    ;
    Eich, Manfred
    ;
    Petrov, Alexander
    We discuss how dynamic light stopping and pulse time reversal can be implemented in dispersive waveguides via indirect photonic transitions induced by moving refractive index fronts. The previous concepts of light stopping/time reversal either require complex local variation of the device's refractive index or rely on the strict phase matching condition, which imposes limitations on the amount of manipulated information. Until now, only single pulses or continuous waves were manipulated experimentally. Our scheme is not limited by a strict phase matching condition and does not require local index variations, thus it can manipulate broadband signals in a single step process. Here, we present several numerically integrated results for pulse time reversal and stopping/storage via indirect front-induced transitions. The presented results are experimentally feasible using existing photonic waveguide technologies.
    Publicationtype: Journal Article
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