Tunable subluminal to superluminal propagation via spatio-temporal solitons by application of Laguerre fields intensities

• Published in: Physics letters. A 2021-02, Vol.388, p.127041, Article 127041
• Main Authors: Arif, Syed Muhammad, Bacha, Bakht Amin, Wahid, Umer, Haneef, Muhammad, Ullah, Arif
• Format: Article
• Language: English
• Subjects: Complex conductivity; Rotary photon drag; Spatio-temporal solitons
• ISSN: 0375-9601; 1873-2429
• DOI: 10.1016/j.physleta.2020.127041

•Modification and controlled of the propagation of probe beam through complex conductive medium by Luguerre fields.•Controlled and modification of refractive indices and group velocities.•Significant tunability from subluminal to superluminal propagation via intensity of Laguerre control fields.•Investigation of dark and bright solitons behavior within time domain.•To enhance the optical information processing and quantum communication. The propagation of probe beam through complex conductive medium is controlled and modified by Laguerre fields. The maximum positive group index of 5.1×105 and group velocity of 630 m/s are reported. Significant tunability from subluminal to superluminal propagation is investigated while using the Laguerre intensities of the control fields. The maximum of negative group index −4.53×105 and group velocity of −667 m/s are reported. The positive group delay time of 60μs is tuned to negative group delay time of −60μs. The larger rotary photon drag of ±0.020 radian is tune to ±0.018 radian from subluminal to superluminal propagation. The pulse intensity is undistorted along the x-axis, y-axis and amplitude of complex conductivity. The dark and bright solitons behavior is investigated with time domain. This work will play a vital role in optical information processing and quantum communication.