  Structural, electronic and optical properties of Cd1-xSrxO (0 \leq x \leq 1)
are calculated for the first time using density functional theory. Our results
show that these properties are strongly dependent on x. The bond between Cd and
O is partially covalent and the covalent nature of the bond decreases as the
concentration of Sr increases from 0 to 100%. It is found that Cd1-xSrxO is an
indirect bandgap compound for the entire range of x and the bandgap of the
alloy increases from 0.85 to 6.00 eV with the increase in Sr concentration.
Frequency dependent dielectric functions {\epsilon}1({\omega}),
{\epsilon}2({\omega}), refractive index n({\omega}) and absorption coefficient
{\alpha}({\omega}) are also calculated and discussed in details. The peak value
of refractive indices shifts to higher energy regions with the increase in Sr.
The striking feature of these alloys is that Cd0.5Sr0.5O is an anisotropic
material. The larger value of the extraordinary refractive index confirms that
the material is positive birefringence crystal. The present comprehensive
theoretical study of the optoelectronic properties of the material predicts
that it can be effectively used in optoelectronic applications in the wide
range of spectrum; IR, visible and UV.
