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| 1 | Research on defects and domain characteristics of MgO-doped near-stoichiometric lithium tantalate in room-temperature polarization process显示文摘MgO-doped congruent and near-stoichiometric lithium tantalate single crystals were grown by Czochralski technique and flux method respectively. Optical absorption studies showed that the UV absorption edge was very sensitive to the composition of the crystals and the decrease in defects led to the blue-shift of the UV-edge. The unit domain shape also related to the composition, and the observed results of the crystal wafers that etched by hydrofluoric acid indicate that the domain structure of near- stoichiometric lithium tantalate is hexagonal. Domain movement characteristics in the room-temperature polarization process and the asymmetry between the domain walls of periodically poled lithium tantalate crystals are discussed in detail. Room-tempera- ture polarization experiment of the grown crystal wafers with 1.8 mm thickness was carried out and periodical structures were obtained. | JIA BaoShen ZHAO YeQuan ZHANG XueFeng | 2010 | Chinese Science Bulletin2010，55，1： | 3 |
| 2 | Third-order nonlinear optical properties of WTe2 films synthesized by pulsed laser deposition显示文摘The prominent third-order nonlinear optical properties of WTe2 films are studied through the Z-scan technique using a femtosecond pulsed laser at 1030 nm.Open-aperture(OA)and closed-aperture(CA)Z-scan measurements are performed at different intensities to investigate the nonlinear absorption and refraction properties of WTe2 films.OA Z-scan results show that WTe2 films always hold a saturable absorption characteristic without transition to reverse saturable absorption.Further,a large nonlinear absorption coefficientβis determined to be-3.37×10^3 cm∕GW by fitting the OA Z-scan curve at the peak intensity of 15.603 GW∕cm^2.In addition,through the slow saturation absorption model,the ground state absorption cross section,excited state absorption cross section,and absorber's density were found to be 1.4938×10^-16 cm^2,1.2536×10^-16 cm^2,and 6.2396×10^20 cm^-3,respectively.CA Z-scan results exhibit a classic peak–valley shape of the CA Z-scan signal,which reveals a self-defocusing optical effect of WTe2 films under the measured environment.Furthermore,a considerable nonlinear refractive index value n2 can be obtained at-1.629×10^-2 cm^2∕GW.Ultimately,the values of the real and imaginary parts of the third-order nonlinear susceptibility of WTe2 are roughly estimated to be-5.93×10^-9 and-1.01×10^-8 esu with the help of first-principles calculations.WTe2 possesses sizeable thirdorder nonlinear coefficients compared with other materials,which suggests that it has great potential to improve performance in nonlinear optical devices. | MI HE YEQUAN CHEN LIPENG ZHU HUAN WANG XUEFENG WANG XINLONG XU ZHANYU REN | 2019 | Photonics Research2019，7，12： | 1 |
| 3 | 显示文摘 | Li Ming-Hua Zhao Yequan Xu Yuheng | 1993 | Chinese science Bullin1993，38，7： | 1 |
| 4 | Growth of MgO-doped near-stoichiometric lithium tantalite crystal and its optical characterization 显示文摘 | ZKAO Yequan JIA Baoshen ZHANG Xuefeng | 2007 | J Chin Ceram Soc (in Chinese)2007，35，8： | 1 |
| 5 | Optical homogeneity and second harmonic generation in Li-rich Mg-doped LN crystals 显示文摘 | ZHANG Tao WANG Biao ZHAO Yequan | 2004 | Mater Chem Phys2004，88，： | 1 |
| 6 | Effects of subchronic cadmium poisoning on DNA methylation in hens显示文摘 | Jiuli Zhang Yequan Fu Jinlong Li Jintao Wang Baoxia He Shiwen Xu | 2008 | Environmental Toxicology and Pharmacology2008，，3： | 1 |
| 7 | Heterojunction solar cells based on graphene woven fabrics and silicon显示文摘Graphene-on-semiconductor has been proved to be a quality heterojunction with efficient photoelectric conversion.In this work,we constructed Schottky junction solar cells by combing graphene woven fabrics(GWFs)and n-doped single crystal silicon,and examined the performance of solar cells when GWFs of different meshes were used.Sparse GWFs possessed high optical transparency but led to poor carrier collection,whereas dense GWFs could collect carriers efficiently but generated too few photo carriers due to low transparency.The GWFs with an optimal mesh could provide a good balance between the generation and collection of photo-induced carriers to deliver high power conversion efficiency. | Yujia Zhong Yequan Xiao Qiao Chen Hongwei Zhu | 2018 | Journal of Materiomics2018，4，2： | 1 |
| 8 | Investigation of the Holographic Storage Property and Application of Zn:Fe:LiNbO3显示文摘 | Yequan Zhao Jun Wang Yuheng Xu | | Ferroelectrics0，253，： | 1 |
| 9 | Optical homogeneity and second harmonic generation in Li-rich Mg-doped LN crystals 显示文摘 | ZANG Tan WANG Biao ZHAO Yequan | 2004 | Mater Chem Phys2004，88，： | 1 |
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