Marjani, Saeid, and Hamid Marjani. “Optimization of a Long Wavelength Vertical-Cavity Surface- Emitting Lasers by Employing Photonic Crystal”. Asian Journal of Chemistry, vol. 24, no. 7, Mar. 2012, pp. 3174-6, https://asianpubs.org/index.php/ajchem/article/view/9322.