Abstract
In this paper, we have shown the existence of large amounts of quintic nonlinearity in asymmetric three-coupled quantum wells, which arise due to a probe pulse and two controlling laser beams. The possibilities of generation and propagation of ultraslow bright optical solitons in these systems have been examined in situations of both Kerr and quintic nonlinearities. We have also demonstrated numerically that these solitons are stable. The modulation instability of a continuous or quasi-continuous wave probe beam has been also investigated and the role of quintic nonlinearity in suppressing this instability has been addressed.
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Acknowledgments
We thank anonymous referees for insightful comments and valuable suggestions. This work is supported by the University Grants Commission, Bahadur Shah Zafar Marg, New Delhi-110001, India, through a post doctoral fellowship [Letter No. F.30-1/2009(SA-II)] and the support is acknowledged with thanks by S. Shwetanshumala. The authors would like to thank Prof. Ajoy Chakraborty, Vice Chancellor, Birla Institute of Technology, for encouragement and moral support. S. Konar would like to thank Prof. M.S. Sodha for his teaching and guidance in nonlinear optics to him.
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Shwetanshumala, S., Konar, S. & Biswas, A. Ultraslow solitons due to large quintic nonlinearity in coupled quantum well structures driven by two control laser beams. Appl. Phys. B 111, 53–64 (2013). https://doi.org/10.1007/s00340-012-5306-0
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DOI: https://doi.org/10.1007/s00340-012-5306-0