人工晶体学报2001，Vol.30Issue(2)：129-134,6.
近化学计量比LiNbO3晶体的生长及其组分测定
Growth of Near-stoichiometric LiNbO3 Crystal and Composition Determination
陈晓军 1李兵 1朱登松 1李冠告 1陈绍林 1黄自恒 1吴仲康1
作者信息
摘要
Abstract
Lithium niobate(LiNbO3) crystal is a kind of typical non-stoichiometric crystal,and generally used one is congruent crystal with ［Li］/［Nb］ ratio of about 48.6/51.4.In this paper,we report that near-stoichiometric LiNbO3 crystal is grown with Czochralski method from a congruent melt with addition of 11mol% K2O.In comparison with congruent one,the position of absorption edge moves to short wave,Ramam linewidth decreases from 9.4cm-1 to 7.0cm-1 for the E mode(153cm-1) and from 25.5cm-1 to 20.0cm-1 for the A1 mode (876cm-1).Its phase-matching temperature for 1064-532nm second harmonic generation increases from room temperature to 155.5℃ and its OH- infrared absorption band is changed distinctly in shape.The linewidth also becomes greatly narrower.According to these measurements,the lithium oxide content in crystal can be estimated to be about 49.6mol%,which is closed to the ideal stoichiometry of LiNbO3 crystal.关键词
铌酸锂晶体/化学计量比/晶体生长分类
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陈晓军,李兵,朱登松,李冠告,陈绍林,黄自恒,吴仲康..近化学计量比LiNbO3晶体的生长及其组分测定[J].人工晶体学报,2001,30(2):129-134,6.
