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学者姓名：俞金玲
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Abstract ：
Optical reflection anisotropy microscopy mappings of micropipe defects on the surface of a 4H-SiC single crystal are studied by the scanning anisotropy microscopy (SAM) system. The reflection anisotropy (RA) image with a 'butterfly pattern' is obtained around the micropipes by SAM. The RA image of the edge dislocations is theoretically simulated based on dislocation theory and the photoelastic principle. By comparing with the Raman spectrum, it is verified that the micropipes consist of edge dislocations. The different patterns of the RA images are due to the different orientations of the Burgers vectors. Besides, the strain distribution of the micropipes is also deduced. One can identify the dislocation type, the direction of the Burgers vector and the optical anisotropy from the RA image by using SAM. Therefore, SAM is an ideal tool to measure the optical anisotropy induced by the strain field around a defect.
Keyword ：
33.20.Fb 33.20.Fb 68.35.Gy 68.35.Gy 78.20.Ci 78.20.Ci 78.20.H- 78.20.H- edge dislocation edge dislocation reflection anisotropy reflection anisotropy scanning anisotropy microscopy scanning anisotropy microscopy SiC SiC
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| GB/T 7714 | Huang, Wei , Yu, Jinling , Liu, Yu et al. Investigation of reflection anisotropy induced by micropipe defects on the surface of a 4H-SiC single crystal using scanning anisotropy microscopy [J]. | CHINESE PHYSICS B , 2024 , 33 (3) . |
| MLA | Huang, Wei et al. "Investigation of reflection anisotropy induced by micropipe defects on the surface of a 4H-SiC single crystal using scanning anisotropy microscopy" . | CHINESE PHYSICS B 33 . 3 (2024) . |
| APA | Huang, Wei , Yu, Jinling , Liu, Yu , Peng, Yan , Wang, Lijun , Liang, Ping et al. Investigation of reflection anisotropy induced by micropipe defects on the surface of a 4H-SiC single crystal using scanning anisotropy microscopy . | CHINESE PHYSICS B , 2024 , 33 (3) . |
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Helicity-dependent photocurrent (HDPC) of the topological surface states (TSSs) in the intrinsic magnetic topological insulator MnBi2Te4 is investigated. It is revealed that the HDPC is mainly contributed by the circular photogalvanic effect (CPGE) current when the incident plane is perpendicular to the connection of the two electrodes, while the circular photon drag effect plays the dominant role when the incident plane is parallel to the connection of the two electrodes. The CPGE current shows an odd function dependence on incident angles, which is consistent with the C 3 v symmetry group of the TSSs in MnBi2Te4. The amplitude of the CPGE current increases with the decrease in temperature, which can be attributed to the increase in mobility at low temperatures, confirmed by the transport measurements. Furthermore, we modulate the CPGE of MnBi2Te4 by applying top gate and source-drain voltages. Compared to Bi2Te3 of the same thickness, the CPGE current of MnBi2Te4 can be more effectively tuned by the top gate because the Fermi level of MnBi2Te4 can be effectively regulated by the top gate, and it is tuned across the Dirac point. This work suggests that the intrinsic magnetic topological insulator MnBi2Te4 is a good candidate for designing opto-spintronics devices.
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| GB/T 7714 | Fu, Houfa , Yu, Jinling , Bai, Yunhe et al. Helicity-dependent photocurrent of topological surface states in the intrinsic magnetic topological insulator MnBi2Te4 [J]. | APPLIED PHYSICS LETTERS , 2024 , 124 (10) . |
| MLA | Fu, Houfa et al. "Helicity-dependent photocurrent of topological surface states in the intrinsic magnetic topological insulator MnBi2Te4" . | APPLIED PHYSICS LETTERS 124 . 10 (2024) . |
| APA | Fu, Houfa , Yu, Jinling , Bai, Yunhe , Cheng, Shuying , Lai, Yunfeng , Chen, Yonghai et al. Helicity-dependent photocurrent of topological surface states in the intrinsic magnetic topological insulator MnBi2Te4 . | APPLIED PHYSICS LETTERS , 2024 , 124 (10) . |
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针对医学断层图像层间分辨率较低的问题，提出了基于形变估计与运动补偿的医学CT图像层间超分辨率算法用于生成切片间图像，从而提高层间分辨率。首先利用U-Net对相邻两幅图像作多尺度特征提取与融合；其次，为了处理层间图像的复杂形变，使用基于自适应协作流的变形扭曲模块来实现相邻切片间的双向形变估计，设计层级信息递进融合模块对金字塔特征层进行特征聚合，对生成图进行运动补偿；最后经过后处理网络以减少异常像素点。该算法在两种CT数据集上进行验证，平均PSNR值分别达到了35.59 dB和30.76 dB,输出图能较好地恢复图像细节。与现有的一些方法对比，相关实验证明了该算法的有效性。
Keyword ：
三维医学图像 三维医学图像 卷积神经网络 卷积神经网络 层间超分辨率 层间超分辨率 形变估计 形变估计
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| GB/T 7714 | 郑智震 , 郑茜颖 , 俞金玲 . 基于形变估计与运动补偿的医学CT图像层间超分辨率算法 [J]. | 计算机应用研究 , 2024 , 41 (04) : 1234-1238 . |
| MLA | 郑智震 et al. "基于形变估计与运动补偿的医学CT图像层间超分辨率算法" . | 计算机应用研究 41 . 04 (2024) : 1234-1238 . |
| APA | 郑智震 , 郑茜颖 , 俞金玲 . 基于形变估计与运动补偿的医学CT图像层间超分辨率算法 . | 计算机应用研究 , 2024 , 41 (04) , 1234-1238 . |
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采用化学气相沉积法制备Bi_2(Se_(0.53)Te_(0.47))_3纳米线，利用扫描电子显微镜和X射线能谱仪对其进行表征，并研究样品的圆偏振光致电流效应(circular photogalvanic effect, CPGE).利用1 064 nm激光激发，分别测试激光入射面垂直于纳米线和平行于纳米线时的CPGE电流.实验结果表明，测得的CPGE电流主要来自纳米线的拓扑表面态.激光垂直入射纳米线时的CPGE电流不为0,说明CPGE电流来源于纳米线能带的六角翘曲效应.本研究测得的Bi_2(Se_(0.53)Te_(0.47))_3纳米线的CPGE电流比文献报导的Bi_2(Te_(0.23)Se_(0.77))_3纳米线增大2倍以上，这是因为Te组分的增加不但使得费米能级更加靠近狄拉克点，还降低了纳米线中载流子复合的概率，二者共同作用，使得CPGE电流增大.
Keyword ：
Bi_2(Se_(0.53)Te_(0.47))_3纳米线 Bi_2(Se_(0.53)Te_(0.47))_3纳米线 化学气相沉积 化学气相沉积 圆偏振光致电流效应 圆偏振光致电流效应 拓扑绝缘体 拓扑绝缘体
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| GB/T 7714 | 冯世尊 , 俞金玲 . Bi_2(Se_(0.53)Te_(0.47))_3纳米线的制备及其圆偏振光致电流效应 [J]. | 福州大学学报(自然科学版) , 2024 , 52 (01) : 14-19 . |
| MLA | 冯世尊 et al. "Bi_2(Se_(0.53)Te_(0.47))_3纳米线的制备及其圆偏振光致电流效应" . | 福州大学学报(自然科学版) 52 . 01 (2024) : 14-19 . |
| APA | 冯世尊 , 俞金玲 . Bi_2(Se_(0.53)Te_(0.47))_3纳米线的制备及其圆偏振光致电流效应 . | 福州大学学报(自然科学版) , 2024 , 52 (01) , 14-19 . |
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Helicity-dependent photocurrent (HDPC) and its modulation in topological insulator Bi2Te3 nanowires have been investigated. It is revealed that when the incident plane of a laser is perpendicular to the nanowire, the HDPC is an odd function of the incident angle, which is mainly contributed by the circular photogalvanic effect originating from the surface states of Bi2Te3 nanowire. When the incident plane of a laser is parallel to the nanowire, the HDPC is approximately an even function of the incident angle, which is due to the circular photon drag effect coming from the surface states. It is found that the HDPC can be effectively tuned by the back gate and the ionic liquid top gate. By analyzing the substrate dependence of the HDPC, we find that the HDPC of the Bi2Te3 nanowire on the Si substrate is an order of magnitude larger than that on SiO2, which may be due to the spin injection from the Si substrate to the Bi2Te3 nanowire. In addition, by applying different biases, the Stokes parameters of a polarized light can be extracted by arithmetic operation of the photocurrents measured in the Bi2Te3 nanowire. This work suggests that topological insulator Bi2Te3 nanowires may provide a good platform for opto-spintronic devices, especially in chirality and polarimtry detection. © 2024 American Chemical Society.
Keyword ：
Bi2Te3 Nanowires Bi2Te3 Nanowires Helicity Dependent Photocurrent Helicity Dependent Photocurrent Ionic Liquid Gating Ionic Liquid Gating Stokes Parameter Detection Stokes Parameter Detection Substrates Substrates
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| GB/T 7714 | Yu, Q. , Feng, S. , Yu, J. et al. Manipulation of Helicity-Dependent Photocurrent and Stokes Parameter Detection in Topological Insulator Bi2Te3 Nanowires [J]. | ACS Applied Materials and Interfaces , 2024 , 16 (30) : 40297-40308 . |
| MLA | Yu, Q. et al. "Manipulation of Helicity-Dependent Photocurrent and Stokes Parameter Detection in Topological Insulator Bi2Te3 Nanowires" . | ACS Applied Materials and Interfaces 16 . 30 (2024) : 40297-40308 . |
| APA | Yu, Q. , Feng, S. , Yu, J. , Cheng, S. , Lai, Y. , Chen, Y. et al. Manipulation of Helicity-Dependent Photocurrent and Stokes Parameter Detection in Topological Insulator Bi2Te3 Nanowires . | ACS Applied Materials and Interfaces , 2024 , 16 (30) , 40297-40308 . |
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Chiral metasurfaces with high quality factors (Q-factors) are a promising platform for achieving chiral optical responses. However, the optical properties of most metasurfaces are fixed once they are fabricated. Here, we study the effect of phase-change material Ge2Sb2Te5 (GST) on the chiral optics of a planar chiral Si metasurface driven by bound states in the continuum (BICs), as the refractive index of the phase-change material changes before and after the phase change. The planar chiral silicon metasurface is capable of generating near-unity (0.99) circular dichroism and giant (0.996) linear dichroism in the infrared region. Notably, phase-change material GST is integrated into the Z-shaped Si metasurfaces. We actively tune the dissipative loss by causing the GST to undergo a phase transition, thereby modulating the optical chirality. In addition, we numerically simulate the effect of the thickness of the phase-change layer and the embedded position on the optical response. Compared with single-functional metasurfaces, this device exhibits better flexibility and more functionalities. It is demonstrated that the optical chirality of the metasurface can be well controlled using the phase-change material GST. © 2024 Optica Publishing Group. All rights, including for text and data mining (TDM), Artificial Intelligence (AI) training, and similar technologies, are reserved.
Keyword ：
Chirality Chirality Chitin Chitin Germanium alloys Germanium alloys Germanium compounds Germanium compounds Light modulation Light modulation Network security Network security Phase shift Phase shift Q factor measurement Q factor measurement Silicon wafers Silicon wafers
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| GB/T 7714 | Chen, Can , Yu, Jinling , Kang, Chen et al. Chiral optical modulation of Si-Ge2Sb2Te5 composite metasurfaces driven by quasi-bound states in the continuum [J]. | Applied Optics , 2024 , 63 (29) : 7682-7691 . |
| MLA | Chen, Can et al. "Chiral optical modulation of Si-Ge2Sb2Te5 composite metasurfaces driven by quasi-bound states in the continuum" . | Applied Optics 63 . 29 (2024) : 7682-7691 . |
| APA | Chen, Can , Yu, Jinling , Kang, Chen , Chen, Yonghai , Lai, Yunfeng , Cheng, Shuying . Chiral optical modulation of Si-Ge2Sb2Te5 composite metasurfaces driven by quasi-bound states in the continuum . | Applied Optics , 2024 , 63 (29) , 7682-7691 . |
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Helicity-dependent photocurrent (HDPC) of the surface states in a high-quality topological insulator (Bi0.7Sb0.3)(2)Te-3 nanoplate grown by chemical vapor deposition (CVD) is investigated. By investigating the angle-dependent HDPC, it is found that the HDPC is mainly contributed by the circular photogalvanic effect (CPGE) current when the incident plane is perpendicular to the connection of the two contacts, whereas the circular photon drag effect (CPDE) dominates the HDPC when the incident plane is parallel to the connection of the two contacts. In addition, the CPGE of the (Bi0.7Sb0.3)(2)Te-3 nanoplate is regulated by temperature, light power, excitation wavelength, the source-drain and ionic liquid top-gate voltages, and the regulation mechanisms are discussed. It is demonstrated that (Bi0.7Sb0.3)(2)Te-3 nanoplates may provide a good platform for novel opto-spintronics devices.
Keyword ：
(Bi0.7Sb0.3)(2)Te-3 nanoplate (Bi0.7Sb0.3)(2)Te-3 nanoplate circular photogalvanic effect circular photogalvanic effect helicity-dependent photocurrent helicity-dependent photocurrent ionic liquid gating ionic liquid gating
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| GB/T 7714 | Yu, Qin , Yu, Jinling , Chen, Yonghai et al. Investigation of helicity-dependent photocurrent of surface states in (Bi0.7Sb0.3)2Te3 nanoplate [J]. | CHINESE PHYSICS B , 2024 , 33 (5) . |
| MLA | Yu, Qin et al. "Investigation of helicity-dependent photocurrent of surface states in (Bi0.7Sb0.3)2Te3 nanoplate" . | CHINESE PHYSICS B 33 . 5 (2024) . |
| APA | Yu, Qin , Yu, Jinling , Chen, Yonghai , Lai, Yunfeng , Cheng, Shuying , He, Ke . Investigation of helicity-dependent photocurrent of surface states in (Bi0.7Sb0.3)2Te3 nanoplate . | CHINESE PHYSICS B , 2024 , 33 (5) . |
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Abstract ：
Helicity-dependent photocurrent (HDPC) of the surface states in a high-quality topological insulator (Bi0.7Sb0.3)2Te3 nanoplate grown by chemical vapor deposition (CVD) is investigated. By investigating the angle-dependent HDPC, it is found that the HDPC is mainly contributed by the circular photogalvanic effect (CPGE) current when the incident plane is perpendicular to the connection of the two contacts, whereas the circular photon drag effect (CPDE) dominates the HDPC when the incident plane is parallel to the connection of the two contacts. In addition, the CPGE of the (Bi0.7Sb0.3)2Te3 nanoplate is regulated by temperature, light power, excitation wavelength, the source–drain and ionic liquid top-gate voltages, and the regulation mechanisms are discussed. It is demonstrated that (Bi0.7Sb0.3)2Te3 nanoplates may provide a good platform for novel opto-spintronics devices.
Keyword ：
(BiSb)Te nanoplate (BiSb)Te nanoplate circular photogalvanic effect circular photogalvanic effect helicity-dependent photocurrent helicity-dependent photocurrent ionic liquid gating ionic liquid gating
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| GB/T 7714 | Qin Yu , Jinling Yu , Yonghai Chen et al. Investigation of helicity-dependent photocurrent of surface states in (BiSb)Te nanoplate [J]. | Chinese Physics B , 2024 , 33 (5) . |
| MLA | Qin Yu et al. "Investigation of helicity-dependent photocurrent of surface states in (BiSb)Te nanoplate" . | Chinese Physics B 33 . 5 (2024) . |
| APA | Qin Yu , Jinling Yu , Yonghai Chen , Yunfeng Lai , Shuying Cheng , Ke He . Investigation of helicity-dependent photocurrent of surface states in (BiSb)Te nanoplate . | Chinese Physics B , 2024 , 33 (5) . |
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提出了一种基于三维拓扑绝缘体Bi_(1.5)Sb_(0.5)Te_(1.8)Se_(1.2)的周期性方环阵列超材料结构。仿真结果表明超材料结构的表面等离子体共振强度随阵列周期和方环内环尺寸的减小而增大，其中，当周期为300 nm或尺寸为25 nm时，可以限制80%的电磁波在表面态上。此外，通过仿真正、斜圆偏振光入射下超材料和非超材料结构的表面电场随偏振态的变化关系，得到了两种结构正、斜入射下的圆二色性；结果表明，超材料结构圆二色性数值为0.92,远大于非超材料结构，并且该超材料结构的圆偏振分量在总偏振光电流分量的占比有显著提升，这是因为有更多的自旋电子被圆偏振光从拓扑表面态激发到体导带上。
Keyword ：
圆二色性 圆二色性 拓扑绝缘体 拓扑绝缘体 表面等离子体共振 表面等离子体共振 超材料 超材料
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| GB/T 7714 | 林宗凯 , 孙仲恒 , 杨知霖 et al. 三维拓扑绝缘体超材料光电效应仿真 [J]. | 半导体光电 , 2024 , 45 (04) : 617-622 . |
| MLA | 林宗凯 et al. "三维拓扑绝缘体超材料光电效应仿真" . | 半导体光电 45 . 04 (2024) : 617-622 . |
| APA | 林宗凯 , 孙仲恒 , 杨知霖 , 周玥 , 孙逊 , 俞金玲 . 三维拓扑绝缘体超材料光电效应仿真 . | 半导体光电 , 2024 , 45 (04) , 617-622 . |
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为提高户外光伏电站现场退化评估的准确性和可靠性,提出一种物理和数据驱动的光伏组件性能退化模型.研究户外光伏组件受静态温度、循环温度、相对湿度和紫外线影响的特性,并综合动态应力函数,利用累积损失模型对多应力下光伏电站性能退化进行建模.此外,退化模型的未知参数通过遗传算法来提取.使用美国国家太阳辐射数据库的长期数据对该模型进行训练和测试.将性能退化实际值和模型计算值进行对比,结果表明,本研究所提出模型的相对误差更低,验证了该方法的可行性.
Keyword ：
优化算法 优化算法 光伏电站 光伏电站 光伏退化 光伏退化 数据驱动 数据驱动
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| GB/T 7714 | 王宇钖 , 陈志聪 , 吴丽君 et al. 利用物理和数据驱动的光伏性能退化建模方法 [J]. | 福州大学学报（自然科学版） , 2024 , 52 (5) : 513-519 . |
| MLA | 王宇钖 et al. "利用物理和数据驱动的光伏性能退化建模方法" . | 福州大学学报（自然科学版） 52 . 5 (2024) : 513-519 . |
| APA | 王宇钖 , 陈志聪 , 吴丽君 , 俞金玲 , 程树英 , 林培杰 . 利用物理和数据驱动的光伏性能退化建模方法 . | 福州大学学报（自然科学版） , 2024 , 52 (5) , 513-519 . |
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