Brief Overview of Seed Rotation Technique (SRT) Apparatus: An Effective Tool for Growing Bulk Size Single Crystals

Single crystals are emerging in technology effectively owing to their superior physical, optical and electronic properties. They serve as fundamental building blocks in advancing various domains, including optoelectronics, nonlinear optics, laser technology and photonics. One of the effective technique for growth of crystals is seed rotation method which has led to significant advancement in the controlled crystal growth process. In the present article, we provide a brief discussion on the seed rotation technique used in solution-based crystal growth methods to enhance the size and quality of crystals. The rotation reduces thermal gradients, inhibiting the emergence of defects such as dislocations and inclusions. It promotes convective mixing within the solution, hence reducing localized temperature variations and facilitating a more uniform thermal environment for the developing crystal. The enhanced thermal uniformity can indirectly mitigate the negative consequences usually linked to abrupt heat gradients, including strain and fault formation during growth. Rotation also facilitates enhanced crystal symmetry and homogeneity, which are crucial for the performance and reliability of crystals utilized in semiconductor, optical and advanced material applications. This article contains an overview on the seed rotation technique (SRT) apparatus and explores the impact of several parameters on crystal quality, as well as the mechanisms that contribute to defect reduction and enhanced structural integrity.