Journal
OPTICS COMMUNICATIONS
Volume 430, Issue -, Pages 461-466Publisher
ELSEVIER
DOI: 10.1016/j.optcom.2018.09.001
Keywords
Solitons; Metamaterials; Dip
Categories
Funding
- National Natural Science Foundation of China [11705130, 1157149]
- Chutian Scholar Program of Hubei Government in China
- Department of Mathematics and Statistics at Tshwane University of Technology, South Africa
- South African National Foundation [92052 IRF1202210126]
- Qatar National Research Fund (QNRF) [NPRP 8-028-1-001]
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We investigate the existence and stability properties of nonlinearly chirped solitary waves on a continuous-wave background in nonlinear metamaterials with higher-order effects such as pseudo-quintic nonlinearity and self-steepening effect. Novel classes of chirped gray solitary pulses (dark pulses with nonzero minimum intensity) are derived by employing the traveling-wave method. The conditions for the formation of these localized pulses as well as the nonlinear chirp associated to them are presented. The stability of the obtained structures is also demonstrated numerically under finite initial perturbations. The results show that the envelope pulses obtained here represent new types of extremely robust nonlinear chirped structures in highly nonlinear metamaterials.
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