Correlation between optical and thermal properties in ZnMgSe solid solutions

Abstract The correlation between the optical (such as complex refractive index, energy band gap) and thermal (such as diffusivity, effusivity and conductivity) properties of Zn 1−x Mg x Se (with 0 ≤ x ≤ 0.50) crystals are presented. The Zn 1−x Mg x Se mixed crystals were grown by the modified high-pressure Bridgman method and were studied using spectroscopic ellipsometry as well as photopyroelectric technique. We found that when Mg content in Zn 1−x Mg x Se increases the value of E g increases. Moreover, the values of thermal conductivity and refractive index of studied materials decrease with increasing Mg content in Zn 1−x Mg x Se. Therefore, from the performed measurements, one can conclude that the incorporation of Mg as constituent into ZnSe crystals plays a crucial role in the observed optical and thermal response.