Investigation of optical pumping on the dielectric properties of near-stoichiometric LiNbO₃: Mg in terahertz range

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• 作者：Dan Li^a ; Yong Liu^a ; Huaixing Wang^a ; Jianquan Yao^a ; ^b ; Furi Ling^a ; ^c ; ^{lingfuri@163.com" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Near-stoichiometric LiNbO3 ; Mg ; Terahertz ; Dielectric properties ; Domain reversal
• 刊名：Optik - International Journal for Light and Electron Optics
• 出版年：2015
• 出版时间：December 2015
• 年：2015
• 卷：126
• 期：24
• 页码：4896-4898
• 全文大小：839 K

文摘

The dielectric properties of near-stoichiometric LiNbO₃:Mg crystal were measured by terahertz time-domain spectroscopy in a frequency range of 0.2 THz to 0.9 THz at room temperature. Experimental results show that the variation of refractive index |Δn| has a linear relationship on scale with the applied light intensity accompanied with a steplike decrease. These results were attributed to the internal space charge field of photorefraction and the light-induced domain reversal in the crystals.