Coupling effects for separate spatial solitons in a biased series centrosymmetric photorefractive crystal circuit considering grey solitons

• Published in: The European physical journal. D, Atomic, molecular, and optical physics Vol. 72; no. 2; pp. 1 - 11
• Main Authors: Katti, Aavishkar, Yadav, Ram Anjore
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.02.2018; Springer Nature B.V
• Subjects: Applications of Nonlinear Dynamics and Chaos Theory; Atomic; Circuits; Coupling; Crystals; Luminous intensity; Molecular; Optical and Plasma Physics; Photorefractive crystals; Photorefractivity; Physical Chemistry; Physics; Physics and Astronomy; Quantum Information Technology; Quantum Physics; Regular Article; Solitary waves; Spectroscopy/Spectrometry; Spintronics; Temperature dependence; Optical Phenomena and Photonics
• ISSN: 1434-6060; 1434-6079
• DOI: 10.1140/epjd/e2017-80396-x

The existence and coupling of grey–grey, grey–bright and grey–dark separate spatial solitons in a biased series centrosymmetric photorefractive crystal circuit is investigated for the first time. The numerical solution of the separate spatial solitons is presented. The coupling between the two separate spatial solitons is analysed for all three cases of separate coupled solitons, namely grey–grey, grey–bright, and grey–dark. Changing the intensity of the soliton in one crystal affects the soliton in both crystals due to flow of the light induced current through the circuit. The effect of the background intensity of each crystal on both the spatial solitons is investigated. Also, the effect of changing the temperature of one crystal affects the soliton in both crystals due to the coupling effect. The soliton width dependence on the temperature is different for each crystal. Graphical abstract