Triclinic Pedial Sarcosinium Hydrogen l(+)‐Tartrate—Crystal Growth, Pyroelectricity, Thermal Expansion, and Linear Optical Properties,Crystal Research and Technology

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Triclinic Pedial Sarcosinium Hydrogen l(+)‐Tartrate—Crystal Growth, Pyroelectricity, Thermal Expansion, and Linear Optical Properties
Crystal Research and Technology ( IF 1.5 ) Pub Date : 2019-06-11 , DOI: 10.1002/crat.201900040
Ladislav Bohatý ₁ , Lkhamsuren Bayarjargal ₂ , Lionel Andersen ₃ , Peter Held ₁ , Petra Becker ₁

Affiliation

Single crystals of optical quality and dimensions up to 25 × 25 × 40 mm³ of sarcosinium hydrogen l(+)‐tartrate and up to 15 × 20 × 30 mm³ of sarcosinium hydrogen d(−)‐tartrate are grown from aqueous solution during growth periods of 10–14 weeks. For sarcosinium hydrogen l(+)‐tartrate refractive indices and their dispersion in the wavelength range 365–1083 nm are determined. The biaxial positive crystals show marked optical anisotropy with maximum birefringence at 365 nm of Δn = 0.089 and only small orientation dispersion of the principal axes of the optical indicatrix. Based on the linear optical data, phase matching conditions for collinear second harmonic generation (SHG) are analyzed. The optical properties allow SHG phase matching for both, type I and type II processes. Temperature‐dependent coefficients of the tensor of thermal expansion [α_ij] between 145 and 300 K show pronounced anisotropy and moderate orientation dispersion of thermal expansion, with principal values at 293 K of

α_{11}^{0}

= −3.3(1) × 10⁻⁶ K⁻¹,

α_{22}^{0}

= 35.7(1) × 10⁻⁶ K⁻¹, and

α_{33}^{0}

= 66.6(1) × 10⁻⁶ K⁻¹. The absolute value of the pyroelectric vector |p^σ| of sarcosinium hydrogen l(+)‐tartrate amounts to about 20 µC K⁻¹ m⁻² and varies only slightly with temperature in the temperature range 100–320 K.

中文翻译：

三斜柄肌氨酸氢l（+）-酒石酸盐—晶体生长，热释电，热膨胀和线性光学性质

从水溶液中生长出的光学质量和尺寸高达25×25×40 mm ³的肌氨酸氢锂（+）-酒石和尺寸达15×20×30 mm ³的单晶体-酒石酸氢（d）-酒石酸盐生长期为10-14周。对于肌氨酸氢l（+）-酒石酸盐的折射率及其在365–1083 nm波长范围内的色散进行了测定。双轴正晶体显示出明显的光学各向异性，并在365 nm处具有最大双折射Δn= 0.089，并且光学指示器的主轴只有很小的方向色散。基于线性光学数据，分析了共线二次谐波（SHG）的相位匹配条件。光学性质允许I型和II型工艺的SHG相位匹配。热膨胀[张量的温度依赖系数α _IJ ] 145和K之间300显示显着的各向异性，热膨胀适中取向分散，与主值在293K的