Abstract

Birefringence in Me-CdP2 photodiodes

Author(s): I.G.Stamov, N.N.Syrbu, L.Nemerenco, V.V.Zalamai

In the paper it is researched the spatial dispersion in CdP2 crystals. The dispersion is positive nk||c> nk||y in the ë>ë0 region and negative nk||c < nk||y in ë<ë0 region. CdP2 crystals are isotropic in case of ë0=896nmand a transmission maximum is observed in case of cross polarizers (n=no– ne=0). The refractive index nk||c is higher in the longwavelength region in reference to ë0 than the refractive index in case of nk||y polarization, the dispersion is positive. In the shortwavelength part an inverse dependence is observed and the dispersion is negative. Current-voltage characteristics had been researched for Me-Cdp2 diodes at different temperatures, temperature dependencies of “imperfection” coefficient ä for different Schottky barriers.The voltage dependence of capacitance had been studied for Me-Cdp2 photodiodes obtained by electro-chemical deposition of metal and thermo-chemicalmetal spraying in vacuum. The dependence of diffusion potential on themetalwork function îm(C) has been revealed. The influence of birefringence and gyration on spectral characteristics of p-n photodiodes and Schottky diodes has been determined. The ability of controlling photodiodes’ characteristics was obtained using the features of gyration in CdP2crystals.


Share this       

Share this Page

Table of Contents

Flyer