“Advancements in Nonlinear Optical Materials: Paving the Way for Future Photonic Devices” (2024) Poornaprajna International Journal of Basic & Applied Sciences (PIJBAS), 1(1), pp. 1–58. Available at: http://poornaprajnapublication.com/index.php/pijbas/article/view/17 (Accessed: 4 October 2025).