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Dynamics of twin pulse propagation and dual-optical switching in a Λ + Ξ atomic medium

Author

Listed:
  • Dong, Hoang Minh
  • Hien, Nguyen Thi Thu
  • Bang, Nguyen Huy
  • Van Doai, Le

Abstract

Optical bistability (OB) and optical multistability (OM) as well as optical soliton and all-optical switching have been successfully established in a lambda + cascade-type five-level atomic medium under electromagnetically induced transparency (EIT) and electromagnetically induced absorption (EIA) regimes. For this configuration, three laser fields are required to excite atomic transitions. The probe laser field with two circularly left- and right-polarized components excites atoms in a lambda-type configuration. Meanwhile, two coupling laser fields excite atoms in a ladder-type configuration. In this way, the above optical phenomena can occur with two frequency channels corresponding to the circularly left- and right-polarized light components. By adjusting the strength/direction of the static magnetic field in the presence of the driving field, the EIT and EIA effects can be swapped, at the same time, OB and OM effects can also be converted. In the EIT regime, the propagation of the probe pulse easily achieves the soliton state, whereas it can be completely extinguished in the EIA regime. This makes it easy to create an all-optical switching mechanism. Especially, both components of the probe field (cw) can be modulated into a synchronous or asynchronous square pulse according to the modulation of the driving field. The results obtained from the investigated model may provide merits of the applications for optical storage and all-optical switching for multi-channel optical communications.

Suggested Citation

  • Dong, Hoang Minh & Hien, Nguyen Thi Thu & Bang, Nguyen Huy & Van Doai, Le, 2024. "Dynamics of twin pulse propagation and dual-optical switching in a Λ + Ξ atomic medium," Chaos, Solitons & Fractals, Elsevier, vol. 178(C).
    • Handle: RePEc:eee:chsofr:v:178:y:2024:i:c:s0960077923012067
    DOI: 10.1016/j.chaos.2023.114304
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    References listed on IDEAS

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    1. El-Nabulsi, Rami Ahmad & Anukool, Waranont, 2023. "A family of nonlinear Schrodinger equations and their solitons solutions," Chaos, Solitons & Fractals, Elsevier, vol. 166(C).
    2. Lene Vestergaard Hau & S. E. Harris & Zachary Dutton & Cyrus H. Behroozi, 1999. "Light speed reduction to 17 metres per second in an ultracold atomic gas," Nature, Nature, vol. 397(6720), pages 594-598, February.
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