AP0868 Study of Transient Laser-Induced Self-Focusing and Optical Modulation of Porous Silicon Films Using Pump-Probe Spectroscopy. IJAP [Internet]. 2025 Jul. 19 [cited 2026 May 7];20(4):867-72. Available from: http://ijap-iq.com/index.php/ijap/article/view/141