Optical properties of Zn doped GaP single crystalsM. M. El-Nahass, H. S. Metwally, H. E. A. El-Sayed, F. Abd El-salam and H. A. HassanEur. Phys. J. Appl. Phys., 43 1 (2008) 31-36DOI: https://doi.org/10.1051/epjap:2008137