https://doi.org/10.1140/epjp/s13360-023-04720-9
Regular Article
Thermal response of single-peak and double-peak nematicons
Department of Physics, Govt. College Madappally, Calicut University, 673102, Calicut, Kerala, India
Received:
16
September
2023
Accepted:
20
November
2023
Published online:
3
December
2023
The thermal responses of single-peak and double-peak solitons in a nematic liquid crystal have been studied numerically. Single-peak nematicons have been obtained for low values of thermal response coefficients. This regime is dominated by focusing reorientational nonlinearity. For comparatively large values of thermal response coefficients, the defocusing thermal nonlinearity exceeds the focusing reorientational nonlinearity. As a result, the beam broadens and develops a flat top, and eventually splits into double-peak nematicons. The competition between focusing reorientational and defocusing thermal nonlinearities lead to the formation of single-peak and double-peak nematicons. The stability of the stationary solutions against small perturbations has been studied employing Bogoliubov-de Gennes equations. Single-peak nematicons are stable regardless of thermal response coefficient values, whereas double-peak nematicons are stable only for large values of thermal response coefficients. The thermal response coefficients decrease the total nonlinear response of the medium, making the beam more resistant to perturbation.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
