Dynamics of Laser Driven Electron Plasma Wave in Collisionless Plasma with Axial Density Ramp: Effect of Self Focusing. - Gupta, Naveen; Johari, Rohit; A. K., Alex; Limbu, Abhay; Sinha, Anchit; Singh, Rajnoor; Ahmad, Aatif (Nonlinear Optics, Quantum Optics: Concepts in Modern Optics, 2025)