光学学报, 1986, 6 (12): 1105, 网络出版: 2011-09-16
偏硼酸钡晶体本征吸收边的实验研究
Experimental investigation of the intrinsic absorption edge for barium mateborate crystals
摘要
本文测定了偏硼酸钡(β-BaB_2O_4)晶体在紫外-真空紫外波段(50nm～350nm)的吸收光谱,及其随温度的变化.用带际间接光学跃迁的理论完满解释了吸收光谱的特性.进而,获得了该晶体的间接边位置为E_o=6,24eV(室温),E_O随温度的变化平均为-6.5×10~(-4)eV/K(288K～363K).此外,还得到了参予带际间接光学跃迁的六种声子的类型和德拜温度.
Abstract
In the present paper, the absorption spectra and their temperature-dependence of barium mateborate (β-BaB2O4) crpstals in the wavelength range of UV-VUV(50nm-350 nm)are reported. The characterises of the absorption spectra can be well explained with the theory of the indirect interband transition. The indirect absorption dege of this crystal is E0 = 6.24eV (at room temperature), and the average temperature coefficient of the indirect band gap is -6.5×10-4eV/K(288K-363K). The types and Debye temperatures of the phonons participating in the indirect transition have also been determined.
杨延勇, 张光寅, 张春平, 陈创天, 吴柏昌. 偏硼酸钡晶体本征吸收边的实验研究[J]. 光学学报, 1986, 6(12): 1105. YANG YANYONG, ZHANG GUANGYIN, ZHANG ChUNPING, CHEN CHuANGTIAN, WU BOCHANG. Experimental investigation of the intrinsic absorption edge for barium mateborate crystals[J]. Acta Optica Sinica, 1986, 6(12): 1105.
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