人工晶体学报, 2020, 49 (8): 1494, 网络出版: 2020-11-11
中红外非线性光学晶体CdSiP2的合成与生长
Synthesis and Growth of Mid-infrared Nonlinear Optical Crystal CdSiP2
非线性光学晶体 红外激光 磷硅镉 晶体生长 透过率 nonlinear optical crystal infrared laser CdSiP2 crystal growth transmittance
摘要
本文以P, Si, Cd为原料采用双温区法合成出140 g的高纯CdSiP2多晶料锭, 分别采用自发形核和施加籽晶的垂直Bridgman法生长出12 mm×40 mm和15 mm×50 mm优质CdSiP2单晶体。所生长的晶体中无宏观散射颗粒, (004)面的单晶摇摆曲线的半峰宽为40″。透过光谱表明CdSiP2晶体在2~6.5 μm的透过率达到57%, 接近其理论最大值。辉光放电质谱检测到晶体中含有少量的Fe、Cr、Mn、Ti等过渡金属。电子顺磁共振波谱检测到Fe+和Mn2+的存在, 这些杂质可能会引起晶体在近红外波段的光学吸收。
Abstract
Polycrystalline ingots were synthesized by two-temperature zone method using P, Si, and Cd as the initial materials. Single crystals CdSiP2 with the size of 12 mm×40 mm and 15 mm×50 mm were successfully grown by self-seeding and seeded vertical Bridgman technique, respectively. The full width at half-maximum of the XRD rocking curve on (004) plane is 40″. The average transmittance of CdSiP2 crystal is 57% at 2-6.5 μm, which is close to its theoretical maximum. A small amount of transition metals, such as Fe, Cr, Mn and Ti, were detected in crystal by glow discharge mass spectrometry. The presence of Fe+ and Mn2+ was determined by electron paramagnetic resonance, which may cause optical absorption of the crystal in the near infrared band.
张国栋, 程奎, 张龙振, 陶绪堂. 中红外非线性光学晶体CdSiP2的合成与生长[J]. 人工晶体学报, 2020, 49(8): 1494. ZHANG Guodong, CHENG Kui, ZHANG Longzhen, TAO Xutang. Synthesis and Growth of Mid-infrared Nonlinear Optical Crystal CdSiP2[J]. Journal of Synthetic Crystals, 2020, 49(8): 1494.