Large third-order susceptibility and third-harmonic generation in centrosymmetric Cu(2)O crystal.
Large third-order susceptibility and third-harmonic generation in centrosymmetric Cu(2)O crystal.
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DOI：
10.1364/ol.34.002817
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发表时间：
2009-09
期刊：
影响因子：
3.6
通讯作者：
S. Mani;J. I. Jang;J. Ketterson
中科院分区：
文献类型：
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作者：
S. Mani;J. I. Jang;J. Ketterson
我们提出了我们认为是第一次实验测定的三阶光学极化率的大块氧化亚铜（Cu（2）O）晶体。采用Z扫描技术在1064 nm处测得的非线性折射率为n（2）=1.32x10（-10）esu，而Cu（2）O的双光子吸收系数为β =5.0 cm/GW。由于Cu（2）O独特的晶体结构和电子结构，在我们的探测范围内，我们还观察到Cu（2）O的强三次谐波产生（THG）。考虑到第一个非零非线性项是χ（3），这种经典半导体可以作为一种很有前途的三倍频有源介质。
We present what we believe to be the first experimental determination of the third-order optical susceptibility chi((3)) of bulk cuprous oxide (Cu(2)O) crystals. The measured nonlinear refractive index, obtained with the Z-scan technique at 1064 nm, is n(2)=1.32x10(-10) esu, while the two-photon absorption coefficient is beta=5.0 cm/GW of Cu(2)O. We also observe strong third-harmonic generation (THG) from Cu(2)O in our detection range owing to its unique crystal and electronic structure. Considering that the first nonvanishing nonlinear term is chi((3)), this classical semiconductor could be utilized as a promising active THG medium.