Stable structure and optical properties of fused silica with NBOHC-E′ defect
Lu Peng-Fei1, 2, †, , Wu Li-Yuan1, Yang Yang1, Wang Wei-Zheng1, Zhang Chun-Fang3, Yang Chuang-Hua4, Su Rui3, Chen Jun5
       

Total energies versus RSi1−O1 for singlet and triplet state.