Acta Optica Sinica, Volume. 6, Issue 12, 1105(1986)
Experimental investigation of the intrinsic absorption edge for barium mateborate crystals
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.
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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