Ammonium dihydrogen phosphate (ADP) crystal utilizes several applications such as Q-switching, electro-optical, and second harmonic generation in nonlinear optics. In the present article, a good-quality single crystal of ADP was grown via Sankaranarayanan–Ramasamy (SR) method for the dimension of 120 mm in length and 12 mm in diameter. The grown ADP crystal is used for diverse characterizations like FTIR spectral study, Vickers microhardness, second harmonic generation, photoluminescence, and chemical etching analysis. The photoacoustic spectroscopy analysis was used to study the thermal diffusivity of the sample. Thermal transport properties of the crystal are required for all types of heat transfer incidences and furthermore used in several applications like acousto-optical, Nd:YAG, and Nd:YLF lasers. A dielectric property was investigated for the grown crystal with dissimilar temperatures, and it was apt for electro-optical and Q-switching applications.

磷酸二氢铵（ADP）晶体利用了多种应用，例如非线性光学中的Q开关，电光和二次谐波生成。在本文中，通过Sankaranarayanan–Ramasamy（SR）方法生长了质量好的ADP单晶，其长度为120毫米，直径为12毫米。生长的ADP晶体用于FTIR光谱研究，维氏显微硬度，二次谐波产生，光致发光和化学蚀刻分析等多种表征。光声光谱分析用于研究样品的热扩散率。晶体的热传递特性是所有类型的热传递事件所必需的，并且还用于声光，Nd：YAG和Nd：YLF激光器等多种应用中。