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Control of beam propagation in optically written waveguides beyond the paraxial approximation

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons45849

Zhang,  Lida
Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society,;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons30404

Dey,  Tarak N.
Department of Physics, Indian Institute of Technology Guwahati, ;
Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society,;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons30455

Evers,  Jörg
Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society,;

Externe Ressourcen
Volltexte (frei zugänglich)

1303.1376.pdf
(Preprint), 9MB

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Zitation

Zhang, L., Dey, T. N., & Evers, J. (2013). Control of beam propagation in optically written waveguides beyond the paraxial approximation. Physical Review A, 87(4): 043842, pp. 1-9. doi:10.1103/PhysRevA.87.043842.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-0013-F3ED-7
Zusammenfassung
Beam propagation beyond the paraxial approximation is studied in an optically written waveguide structure. The waveguide structure that leads to diffractionless light propagation, is imprinted on a medium consisting of a five-level atomic vapor driven by an incoherent pump and two coherent spatially dependent control and plane-wave fields. We first study propagation in a single optically written waveguide, and find that the paraxial approximation does not provide an accurate description of the probe propagation. We then employ coherent control fields such that two parallel and one tilted Gaussian beams produce a branched waveguide structure. The tilted beam allows selective steering of the probe beam into different branches of the waveguide structure. The transmission of the probe beam for a particular branch can be improved by changing the width of the titled Gaussian control beam as well as the intensity of the spatially dependent incoherent pump field.