Synthesis and Characterization of High Purity ZnGeP2

9361988单晶具有优异的非线性和光学性能，使其成为最有吸引力的光学参量振荡器和放大器的候选者，能够在2.5um到13um范围内产生可调谐的激光辐射。由于合成方法不能提供所需的精确化学计量比和高纯度，在1-3微米之间的异常吸收，以及缺乏关于锌-锗-磷系统的压力-温度-组成的数据，阻碍了锌Gep2晶体的发展。在第一阶段中，我们建议使用一种新的两温合成方法来制备在准确的化学计量点上下的不同组成的ZnGeP2样品，并从准确的元素组成、光学透过率、晶格常数、电阻率和光电导等方面对其进行表征。一个重要的目标将是了解1到3微米吸收的性质并找到消除它的方法。

9361988 tsve ZnGeP2 single crystals have outstanding nonlinear and optical properties that make them the most attractive candidate for optical parametric oscillators and amplifiers capable of producing tunable laser radiation in the 2.5 to 13 um region. The development of ZnGep2 crystals has been hampered by synthesis methods that are not capable of providing the required precise stoichiometry and high purity, by an anomalous absorption between 1 and 3 um, and also by al lack of data on the pressure-temperature-composition of the Zn-Ge-P system. In Phase I we propose to use a new two-temperature synthesis to prepare ZnGeP2 samples o f varying composition above and below the exact stoichimetric point and to characterized them with respect to accurate elemental composition, optical transmission, lattice constants, resistivity and photoconductivity. An important objective will be to understand the nature of the 1 to 3 um absorption and to find out how to eliminate it.