Query：
学者姓名：赖云锋
Refining：
Year
Type
Indexed by
Source
Complex
Former Name
Co-
Language
Clean All
Abstract ：
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
Cite：
Copy from the list or Export to your reference management。
| 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 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
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
Cite：
Copy from the list or Export to your reference management。
| 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 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
Orthogonal eigenmodes in multimode waveguides are an indispensable physical dimension for enhancing the capacity of optical communications, and efficient mode converters are therefore of vital functional significance. However, the conventional single-pair mode conversion in a single device is having difficulty meeting the ever-increasing demand for optical capacity. By contrast, the multi-pair mode converter can improve the multiplexing capacity and be further applied in spatial-mode-oriented passive signal switching and permutation cipher. Here, a scalable multi-mode converting model, combing the multimode interference and beam shaping by exploiting subwavelength metamaterials, is firstly reported to enable simultaneous multi-spatial-mode manipulation and break its polarization-dependency limit. Based on this model, five proof-of-concept converters are designed, realizing polarization-independent, and multi-mode conversions, or a combination of both within compact lengths (< 17.436 mm). For the first time, TE0/TM0-to-TE2/TM2, TE0/TE1/TE2-to-TE2/TE3/ TE4, TE0/TE1/TM0/TM1-to-TE2/TE3/TM2/TM3, and TE0/TE1-to-TE1/TE2 converters are reported and experimentally demonstrated, covering a double/triple/quadruple-mode manipulation in a single device. From measurements, these converters exhibit low insertion losses (0.72 to 1.65 dB) and intermodal crosstalks (-30.26 to -12.19 dB) at 1550 nm, and have a 56-nm/30-nm bandwidth of loss < 1.4 dB/1.9 dB and crosstalk < -13 dB/-10.5 dB, for the best/worst case. The proposed multi-mode converting model can manipulate multiple input modes in parallel and beak the polarization-dependency limit for multi-spatial-mode conversion, which holds great potential for spatial-mode-oriented nanophotonic systems. IEEE
Keyword ：
Crosstalk Crosstalk integrated optical devices integrated optical devices Mode division (de)multiplexing Mode division (de)multiplexing mode-order converter mode-order converter Optical fiber sensors Optical fiber sensors Optical polarization Optical polarization Perturbation methods Perturbation methods Scalability Scalability Solid modeling Solid modeling System-on-chip System-on-chip
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Guo, Z. , Xiao, J. , Wu, S. et al. Compact, Scalable and Flexible Multi-Mode-Converting Model Employing Subwavelength Gratings [J]. | Journal of Lightwave Technology , 2024 , 42 (20) : 1-14 . |
| MLA | Guo, Z. et al. "Compact, Scalable and Flexible Multi-Mode-Converting Model Employing Subwavelength Gratings" . | Journal of Lightwave Technology 42 . 20 (2024) : 1-14 . |
| APA | Guo, Z. , Xiao, J. , Wu, S. , Lai, Y. , Cheng, S. . Compact, Scalable and Flexible Multi-Mode-Converting Model Employing Subwavelength Gratings . | Journal of Lightwave Technology , 2024 , 42 (20) , 1-14 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
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
Cite：
Copy from the list or Export to your reference management。
| 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) . |
| Export to | NoteExpress RIS BibTex |
Version ：
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
Cite：
Copy from the list or Export to your reference management。
| 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) . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
提出一种基于伪标签-1D DenseNet-KNN的光伏阵列故障诊断方法,实现在少标签样本下的光伏阵列复合故障开集识别.首先,分析各种常见单一故障和灰尘覆盖下复合故障的I-V特性曲线;然后,为克服常规半监督机器学习算法需手动提取数据特征的问题,采用一种伪标签与1D DenseNet相结合的半监督方法自动提取特征;最后,将从训练数据中提取的特征、训练数据预测的标签和测试样本提取的特征输入KNN算法并进行开集复合故障诊断.实验表明,该方法不仅能准确分类各种已知类别样本,还能识别出未知类别故障,且模型训练只需要少量的标签数据.
Keyword ：
I-V特性曲线 I-V特性曲线 KNN算法 KNN算法 伪标签半监督学习 伪标签半监督学习 光伏阵列 光伏阵列 开集识别 开集识别 故障诊断 故障诊断
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | 陈泽理 , 卢箫扬 , 林培杰 et al. 基于伪标签-1D DenseNet-KNN的光伏阵列开集复合故障诊断方法 [J]. | 福州大学学报（自然科学版） , 2023 , 51 (4) : 490-497 . |
| MLA | 陈泽理 et al. "基于伪标签-1D DenseNet-KNN的光伏阵列开集复合故障诊断方法" . | 福州大学学报（自然科学版） 51 . 4 (2023) : 490-497 . |
| APA | 陈泽理 , 卢箫扬 , 林培杰 , 赖云锋 , 程树英 , 陈志聪 et al. 基于伪标签-1D DenseNet-KNN的光伏阵列开集复合故障诊断方法 . | 福州大学学报（自然科学版） , 2023 , 51 (4) , 490-497 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
Three-dimensional (3D) topological insulators (TIs) have attracted much attention due to their topologically protected surface states. Here, we use circularly polarized light to induce the photo-induced anomalous Hall effect (PAHE) in 3D TIs Sb2Te3 thin films with different thicknesses of 5, 7, 12 and 20 quintuple layers (QLs) at room temperature. The dependence of PAHE current on the light spot locations of Sb2Te3 thin films is investigated, which is found to show a completely different behavior from that observed in two-dimensional electron gas (2DEG) systems. This is due to the fact that the total PAHE current is the superposition of the PAHE of the top and bottom surface states. A theoretical model has been proposed to separate the PAHE current of the top and bottom surface states. In addition, as the thickness of the Sb2Te3 film increases from 5 QL to 20 QL, the PAHE currents of the top and bottom surface states first increase and then decrease. The photo-induced anomalous Hall, conductivity of the top surface states in the 7-QL Sb2Te3 film excited by 1064 nm light is as large as 592 nA & BULL; V-1 & BULL; cm & BULL; W-1, which is much larger than that observed in InGaAs/AlGaAs quantum wells (4.45 nA & BULL; V-1 & BULL; cm & BULL; W-1) and GaN/AlGaN heterostructures (1.43 nA & BULL; V-1 & BULL; cm & BULL; W-1). The giant PAHE value observed in Sb2Te3 films suggests that 3D TIs may provide a good platform for spintronic devices.
Keyword ：
Photo-induced anomalous Hall effects Photo-induced anomalous Hall effects Sb2Te3 Sb2Te3 Spatial distribution Spatial distribution Top and bottom surface states Top and bottom surface states Topological insulators Topological insulators
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Lang, Xinjie , Yu, Jinling , Hong, Xiyu et al. Spatial distribution of photo-induced anomalous Hall effects of the top and bottom surface states in topological insulators Sb2Te3 [J]. | PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES , 2023 , 150 . |
| MLA | Lang, Xinjie et al. "Spatial distribution of photo-induced anomalous Hall effects of the top and bottom surface states in topological insulators Sb2Te3" . | PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES 150 (2023) . |
| APA | Lang, Xinjie , Yu, Jinling , Hong, Xiyu , Chen, Yonghai , Cheng, Shuying , Lai, Yunfeng et al. Spatial distribution of photo-induced anomalous Hall effects of the top and bottom surface states in topological insulators Sb2Te3 . | PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES , 2023 , 150 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
Bismuthoxyselenide (Bi2O2Se) is a two-dimensional(2D) layered semiconductor material with high electron Hall mobilityand excellent environmental stability as well as strong spin-orbitinteraction (SOI), which has attracted intense attention for applicationin spintronic and spin optoelectronic devices. However, a comprehensivestudy of spin photocurrent and its microscopic origin in Bi2O2Se is still missing. Here, the helicity-dependent photocurrent(HDPC) was investigated in Bi2O2Se nanosheets.By analyzing the dependence of HDPC on the angle of incidence, wefind that the HDPC originates from surface states with C ( s ) symmetry in Bi2O2Se, which can be attributed to the circular photogalvanic effect(CPGE) and circular photon drag effect (CPDE). It is revealed thatthe HDPC current almost changes linearly with the source-drainvoltage. Furthermore, we demonstrate effective tuning of HDPC inBi(2)O(2)Se by ionic liquid gating, indicating thatthe spin splitting of the surface electronic structure is effectivelytuned. By analyzing the gate voltage dependence of HDPC, we can unambiguouslyidentify the surface polarity and the surface electronic structureof Bi2O2Se. The large HDPC in Bi2O2Se nanosheets and its efficient electrical tuning demonstratethat 2D Bi2O2Se nanosheets may provide a goodplatform for opto-spintronics devices.
Keyword ：
Bi2O2Se nanosheets Bi2O2Se nanosheets circular photogalvanic effect circular photogalvanic effect circularphoton drag effect circularphoton drag effect helicity-dependentphotocurrent helicity-dependentphotocurrent ionic liquid ionic liquid surface polarity surface polarity
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Wu, Wenyi , Yu, Jinling , Chen, Yong-Hai et al. Electric Control of Helicity-Dependent Photocurrent and Surface Polarity Detection on Two-Dimensional Bi2O2Se Nanosheets [J]. | ACS NANO , 2023 , 17 (17) : 16633-16643 . |
| MLA | Wu, Wenyi et al. "Electric Control of Helicity-Dependent Photocurrent and Surface Polarity Detection on Two-Dimensional Bi2O2Se Nanosheets" . | ACS NANO 17 . 17 (2023) : 16633-16643 . |
| APA | Wu, Wenyi , Yu, Jinling , Chen, Yong-Hai , Liu, Yu , Cheng, Shuying , Lai, Yunfeng et al. Electric Control of Helicity-Dependent Photocurrent and Surface Polarity Detection on Two-Dimensional Bi2O2Se Nanosheets . | ACS NANO , 2023 , 17 (17) , 16633-16643 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
Lanthanide-doped upconversion nanoparticles (UCNPs)have potential applications in optical and optoelectronic devices due to their novel optical properties. The surface plasmon is an effective method in improving the upconversion luminescence (UCL) properties, and it is essential to tunee the distance between the metal NPs and UCNPs for improving UCL. In this work, the Ag/TiO2/NaGdF4:Er3+/Yb3+/Al3+ composite films were fabricated, and the effect of the TiO2 layer thickness on spectral characteristics in the composite films was investigated. It is shown that the thickness of TiO2 film has a significant effect on the Ag NPs plasma resonance and fluorescence intensity. The maximum upconversion emission enhancement factors of the red and green emission were obtained for the sample with 15-nm-thickness TiO2 under the 980 nm excitation. That is mainly originated from the enhancement of the resonate energy transfer (Yb3+→Er3+) rate under the competition between non-radiative transition and local field effects. © 2022 Informa UK Limited, trading as Taylor & Francis Group.
Keyword ：
Ag/TiO2/NaGdF4:Er3+/Yb3+/Al3+ composite films Ag/TiO2/NaGdF4:Er3+/Yb3+/Al3+ composite films energy transfer energy transfer plasma resonance plasma resonance Upconversion fluorescence enhancement Upconversion fluorescence enhancement
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Zheng, P. , Chen, M. , Zhou, H. et al. Influence of TiO2 Space layer on plasmon enhanced Luminescence of Ag/TiO2/NaGdF4:Er3+/Yb3+/Al3+ composite Films [J]. | Materials Research Innovations , 2023 , 27 (5) : 289-295 . |
| MLA | Zheng, P. et al. "Influence of TiO2 Space layer on plasmon enhanced Luminescence of Ag/TiO2/NaGdF4:Er3+/Yb3+/Al3+ composite Films" . | Materials Research Innovations 27 . 5 (2023) : 289-295 . |
| APA | Zheng, P. , Chen, M. , Zhou, H. , Wang, C. , Lai, Y. , Yu, J. et al. Influence of TiO2 Space layer on plasmon enhanced Luminescence of Ag/TiO2/NaGdF4:Er3+/Yb3+/Al3+ composite Films . | Materials Research Innovations , 2023 , 27 (5) , 289-295 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
The helicity-dependent photoconductance of the edge states in three-dimensional topological insulator Bi2Te3 films is investigated. It is revealed that the helicity-dependent photoconductivity current on the left edge of the Bi2Te3 film shows an opposite sign with that on the right edge. In addition, the helicity-dependent photoconductivity current increases linearly with the applied longitudinal electric field, and it reverses the sign with the reversal of the electric field. As the thickness of the Bi2Te3 film increases, the helicity-dependent photoconductivity current also increases. Theoretical analysis suggests that the helicity-dependent photo-conductivity current may come from the intrinsic spin orbit coupling (SOC) or the SOC introduced by the chiral impurities or defects.
Keyword ：
Bi2Te3 Bi2Te3 edge states edge states helicity-dependent photoconductance helicity-dependent photoconductance spin orbit coupling spin orbit coupling
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Zhou, Yuchao , Yu, Jinling , Chen, Yonghai et al. Helicity-dependent photoconductance of the edge states in the topological insulator Bi2Te3 [J]. | CHINESE PHYSICS B , 2023 , 32 (8) . |
| MLA | Zhou, Yuchao et al. "Helicity-dependent photoconductance of the edge states in the topological insulator Bi2Te3" . | CHINESE PHYSICS B 32 . 8 (2023) . |
| APA | Zhou, Yuchao , Yu, Jinling , Chen, Yonghai , Lai, Yunfeng , Cheng, Shuying . Helicity-dependent photoconductance of the edge states in the topological insulator Bi2Te3 . | CHINESE PHYSICS B , 2023 , 32 (8) . |
| Export to | NoteExpress RIS BibTex |
Version ：
Export
| Results： |
Selected to |
| Format： |
