CdWO_4:Cr^(3+)晶体的吸收光谱特性

Absorption spectroscopic characteristic of CdWO_4:Cr^(3+) crystals

采用提拉法生长了CdWO_4:Cr^(3+)单晶.测量了它的吸收光谱及其退火效应,认为Cr^(3+)吸收峰降低的原因是色心和杂质引起的自吸收。并根据吸收谱,确定了Cr^(3+)的几个主要能级~4T_1、~4T_2和~2E位置,以及~2E和~4T_2能级差△E=-1430.1cm^(-1)。

Cadmium tungstate single crystals doped with Cr3+ are grown by Czochralskr technique. The absorption spectra are measured. The low peaks of Cr3+ are due to the self absorption induced by the colour centers and the impurities. The positions of the major energy levels 4T1, 4T2 and 2E of Cr3+ and the energy level difference E=-1430cm-1 between 2E and 4T2 are determined.