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学者姓名：程树英
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Abstract ：
Different from conventional mode-order converters, the mode exchangers (EXCij), enabling flexible data exchanging between i-th-mode and j-th-mode, are essential building blocks for passive signal switching, signal routing, and high-capacity mode division multiplexing (MDM) networks. However, mode changers are limited by the strong polarization-dependence, especially on the 220-nm-thick silicon-on-insulator (SOI) platform. In this paper, an ultracompact and polarization-independent EXC01 and EXC02 are proposed to overcome this limitation by using MZI-like models. Here, subwavelength grating (SWG) metamaterials are introduced to the input/output Y-branches for mode splitting/combining and one arm for phase shifting. As such, a pi phase difference is formed by the SWG-manipulated phase shifter and then the modes guided in branches are combined into the required output modes. The characterizations show low insertion losses (<1.6 dB) and crosstalk (<-15 dB) over bandwidths of 31 nm and 49 nm, for EXC01 and EXC02, respectively. For footprints, EXC01/EXC02 has ultracompact size of 13.42 x 1.704/2.044 x 8.434 mu m(2). For the first time, a polarization-independent mode change between 0-th-mode (0-th-mode) and 1-th-mode (2-th-mode) are achieved and can be applied in in flexible MDM systems, signal routing, passive signal switching and beyond.
Keyword ：
Bandwidth Bandwidth Integrated optical devices Integrated optical devices Metamaterials Metamaterials mode change mode change mode division multiplexing mode division multiplexing mode-order converters mode-order converters multimode photonics multimode photonics Optical sensors Optical sensors Phase shifters Phase shifters Photonics Photonics Refractive index Refractive index Silicon Silicon
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| GB/T 7714 | Guo, Zhenzhao , Wu, Shengbao , Lai, Yunfeng et al. Ultracompact and Polarization-Independent On-Chip Mode Exchangers Enabled by Subwavelength Grating Metamaterials [J]. | JOURNAL OF LIGHTWAVE TECHNOLOGY , 2025 , 43 (1) : 308-316 . |
| MLA | Guo, Zhenzhao et al. "Ultracompact and Polarization-Independent On-Chip Mode Exchangers Enabled by Subwavelength Grating Metamaterials" . | JOURNAL OF LIGHTWAVE TECHNOLOGY 43 . 1 (2025) : 308-316 . |
| APA | Guo, Zhenzhao , Wu, Shengbao , Lai, Yunfeng , Cheng, Shuying . Ultracompact and Polarization-Independent On-Chip Mode Exchangers Enabled by Subwavelength Grating Metamaterials . | JOURNAL OF LIGHTWAVE TECHNOLOGY , 2025 , 43 (1) , 308-316 . |
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2D perovskite materials are ideal candidates for indoor photovoltaic (IPV) applications due to their tunable bandgap, high absorption coefficients, and enhanced stability. However, attaining uniform crystallization and overcoming low carrier mobility remain key challenges for 2D perovskites, limiting their overall performance. In this study, a 2D perovskite light-absorbing layer is constructed using a Dion-Jacobson (DJ)-phase EDA(FA)(4)Pb5I16 (n = 5) and introduced butylammonium iodide (BAI) for interface modification, thereby creating a novel DJ/Ruddlesden-Popper (RP) dual 2D perovskite heterostructure. By adjusting the thickness of the BAI-based perovskite layer, the relationship between interfacial defect states and carrier mobility is investigated under varying indoor light intensities. The results indicate that, by achieving a balance between interfacial defect passivation and carrier transport, the optimized 2D perovskite device reaches a power conversion efficiency (PCE) of 30.30% and an open-circuit voltage (V-OC) of 936 mV under 1000 lux (3000 K LED). 2D-DJ/RP perovskite IPV exhibits a twentyfold increase in T-90 lifetime compared to 3D perovskite devices. It is the first time to systematically study 2D perovskites in IPV applications, demonstrating that rationally designed and optimized 2D perovskites hold significant potential for fabricating high-performance indoor PSCs.
Keyword ：
2D perovskite solar cells 2D perovskite solar cells carrier transport carrier transport defect passivation defect passivation dual-phase 2D perovskite heterostructures dual-phase 2D perovskite heterostructures indoor photovoltaic indoor photovoltaic
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| GB/T 7714 | Wang, Renjie , Wu, Jionghua , Zheng, Qiao et al. Stable and Efficient Indoor Photovoltaics Through Novel Dual-Phase 2D Perovskite Heterostructures [J]. | ADVANCED MATERIALS , 2025 , 37 (18) . |
| MLA | Wang, Renjie et al. "Stable and Efficient Indoor Photovoltaics Through Novel Dual-Phase 2D Perovskite Heterostructures" . | ADVANCED MATERIALS 37 . 18 (2025) . |
| APA | Wang, Renjie , Wu, Jionghua , Zheng, Qiao , Deng, Hui , Wang, Weihuang , Chen, Jing et al. Stable and Efficient Indoor Photovoltaics Through Novel Dual-Phase 2D Perovskite Heterostructures . | ADVANCED MATERIALS , 2025 , 37 (18) . |
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Topological edge states, emerging at boundaries between regions with distinct topological properties, enable unidirectional transmission with robustness against defects and disorder. However, achieving dual-band operation with high performance remains challenging. Here, we integrate dual-band topological edge states into a valley photonic crystal cavity operating in the mid-infrared region, leveraging triangular scatterers. A key contribution of this work is the simultaneous realization of ultra-high Q-factors (up to 6.1593 × 109) and uniform mode distribution (inverse participation ratio © 2025 by the authors.
Keyword ：
Inverse problems Inverse problems Photonic integrated circuits Photonic integrated circuits Q factor measurement Q factor measurement
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| GB/T 7714 | Kang, Chen , Yu, Jinling , Chen, Can et al. Dual-Band Topological Valley Cavity in Mid-Infrared Range [J]. | Photonics , 2025 , 12 (5) . |
| MLA | Kang, Chen et al. "Dual-Band Topological Valley Cavity in Mid-Infrared Range" . | Photonics 12 . 5 (2025) . |
| APA | Kang, Chen , Yu, Jinling , Chen, Can , Lai, Yunfeng , Cheng, Shuying , Chen, Yonghai et al. Dual-Band Topological Valley Cavity in Mid-Infrared Range . | Photonics , 2025 , 12 (5) . |
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The commercial application of flexible lithium-sulfur batteries is severely hindered by poor conductivity, low active material loading, polysulfide shuttle effects, and sluggish redox kinetics. Herein, we developed a unique three-dimensional (3D) conductive network framework decorated with NiCo bimetallic particles. The 3D porous carbon conductive network skeleton formed by crosslinked carbon nanotubes effectively mitigates the volume expansion of sulfur and accommodates abundant active materials for high discharge capacity. Meanwhile, the NiCo bimetallic combines the catalytic role of Ni in sulfur reduction and Co in sulfur oxidation to achieve improved kinetics of the entire conversion of sulfur. Most importantly, the sulfur host synergizes the conducting CNTs and catalytically active bimetallic, increasing conductance and accelerating reaction kinetics, resulting in a significant improvement in rate performance. Consequently, the cells equipped with NiCo@CNT-S cathode exhibit a low-capacity decay rate of only 0.07% per cycle over 400 cycles at 1C, and an ultra-high initial specific capacity of 1030 mAh g- 1 at a high rate of 5C. Notably, the pouch cell assembled with the NiCo@CNT-S could deliver a high areal discharge capacity of 8.2 mAh cm- 2 at 0.1C, with a sulfur loading of 7.1 mg cm-2 and an E/S ratio of 7.1 mu L mg-1. This work provides novel structural design and mechanism insights for the practical application of flexible lithium-sulfur batteries.
Keyword ：
Bimetal Bimetal Carbon nanotubes Carbon nanotubes Li-S batteries Li-S batteries Lithium polysulfides Lithium polysulfides Rate performance Rate performance
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| GB/T 7714 | Liao, Shuyu , Xie, Yonghui , Zheng, Wenrui et al. Enhancing rate performance in lithium-sulfur batteries via synergistic bidirectional catalysis and improved conductivity [J]. | CHEMICAL ENGINEERING JOURNAL , 2025 , 506 . |
| MLA | Liao, Shuyu et al. "Enhancing rate performance in lithium-sulfur batteries via synergistic bidirectional catalysis and improved conductivity" . | CHEMICAL ENGINEERING JOURNAL 506 (2025) . |
| APA | Liao, Shuyu , Xie, Yonghui , Zheng, Wenrui , Huang, Zewei , Zhang, Hong , Luo, Zhong-Zhen et al. Enhancing rate performance in lithium-sulfur batteries via synergistic bidirectional catalysis and improved conductivity . | CHEMICAL ENGINEERING JOURNAL , 2025 , 506 . |
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Rare earth-doped upconversion nanomaterials have wide application prospects in photothermal sensing，biomedicine and so on，but it has poor thermal conductivity，low temperature measurement sensitivity and upconver⁃ sion luminescence（UCL）intensity. It’s an effective way to improve their UCL intensity and photothermal perfor⁃ mance by assembling composite films which contain single-walled carbon nanotubes（SWCNT），noble metal and pho⁃ tonic crystals（PCs）. In this work，NaGdF4∶Er3+/Yb3+/Al3+ nanocrystalls（UCNPs）were synthesized by the solvother⁃ mal method. The photothermal performance of upconversion layer（UC），SWCNT/UC，Ag/SWCNT/UC and PCs/Ag/ SWCNT/UC were compared，and the effects of different film layers on the photothermal performance of UCNPs were studied. The results indicate that PCs/Ag/SWCNT/UC has the best performance，and compared with the UC film，the enhancement factors of red and green emission intensities are 3. 48 and 4. 24 times，respectively. Its photothermal conversion efficiency is 33. 79%，which is 1. 49 times of UC’s. The absolute sensitivity（SA）of the optical tempera⁃ ture measurement is obtained as 3. 14×10−3 K−1 at 353 K and the relative sensitivity（SR）is obtained as 1. 87×10−2 K−1 at 273 K. The work provides an effective way to improve the performance of the photothermal sensor. © 2025 Editorial Office of Chinese Optics. All rights reserved.
Keyword ：
Carbon films Carbon films Indium phosphide Indium phosphide Nanocomposite films Nanocomposite films Nanocrystals Nanocrystals Single-walled carbon nanotubes (SWCN) Single-walled carbon nanotubes (SWCN) Strain measurement Strain measurement Thermography (temperature measurement) Thermography (temperature measurement) Uranium compounds Uranium compounds Ytterbium compounds Ytterbium compounds
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| GB/T 7714 | Shao, Zejie , Zhou, Haifang , Zheng, Ruijin et al. Upconversion Luminescence and Photothermal Properties of Composite Films Based on NaGdF4∶Er3+/Yb3+/Al3+ [J]. | Chinese Journal of Luminescence , 2025 , 46 (1) : 89-97 . |
| MLA | Shao, Zejie et al. "Upconversion Luminescence and Photothermal Properties of Composite Films Based on NaGdF4∶Er3+/Yb3+/Al3+" . | Chinese Journal of Luminescence 46 . 1 (2025) : 89-97 . |
| APA | Shao, Zejie , Zhou, Haifang , Zheng, Ruijin , Cheng, Shuying . Upconversion Luminescence and Photothermal Properties of Composite Films Based on NaGdF4∶Er3+/Yb3+/Al3+ . | Chinese Journal of Luminescence , 2025 , 46 (1) , 89-97 . |
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稀土掺杂的上转换纳米材料在光热传感、生物医学等领域有着广泛的应用前景,但其存在导热性差、测温灵敏度与上转换发光(UCL)强度低的问题,而添加单壁碳纳米管(SWCNT)、贵金属与光子晶体(PCs)是提高其UCL强度与光热性能的有效手段.本文使用溶剂热法合成了NaGdF4∶Er3+/Yb3+/Al3+纳米晶体(UCNPs),通过对比上转换层(UC)、SWCNT/UC、Ag/SWCNT/UC与PCs/Ag/SWCNT/UC的光热性能,研究不同膜层对UCNPs的光热性能影响.结果表明,PCs/Ag/SWCNT/UC具有优异的性能,其红绿光强度分别为UC的3.48倍与4.24倍,其光热转换效率达到33.79%,是UC的1.49倍;并且光学测温绝对灵敏度SA在353 K时达到3.14×10-3 K-1,相对灵敏度SR在273 K时达到1.87×10-2 K-1.本研究为提高光热传感器性能提供了一种有效的策略.
Keyword ：
NaGdF4∶Er3+/Yb3+/Al3+纳米晶 NaGdF4∶Er3+/Yb3+/Al3+纳米晶 光热性能 光热性能 复合薄膜 复合薄膜 测温灵敏度 测温灵敏度
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| GB/T 7714 | 邵泽杰 , 周海芳 , 郑瑞锦 et al. 基于NaGdF4∶Er3+/Yb3+/Al3+的复合薄膜上转换发光与光热性能 [J]. | 发光学报 , 2025 , 46 (1) : 89-97 . |
| MLA | 邵泽杰 et al. "基于NaGdF4∶Er3+/Yb3+/Al3+的复合薄膜上转换发光与光热性能" . | 发光学报 46 . 1 (2025) : 89-97 . |
| APA | 邵泽杰 , 周海芳 , 郑瑞锦 , 程树英 . 基于NaGdF4∶Er3+/Yb3+/Al3+的复合薄膜上转换发光与光热性能 . | 发光学报 , 2025 , 46 (1) , 89-97 . |
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为解决生成对抗网络训练过程中因损失简单加权导致的图像感知质量下降问题,提出损失自适应调整的生成对抗超分辨率网络(LA-GAN).首先,该方法设计通过计算角点分布的相关强度大小,区分规则纹理区域与不规则纹理区域.其次,基于不同区域,设计了区域自适应生成对抗学习框架.在该框架中,网络只在不规则纹理区域中进行对抗学习,提高感知质量.此外,基于下采样图像和图像块相似性的重组图像取代训练集中的高分辨率图像,实现平均绝对损失在不规则纹理区域弱约束网络,在规则纹理区域强约束网络,保证图像信号保真度.最后,通过实验证明经过优化的网络在信号保真度和感知质量方面皆有提升.
Keyword ：
区域自适应 区域自适应 损失函数 损失函数 生成对抗网络 生成对抗网络 超分辨率 超分辨率
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| GB/T 7714 | 林旭锋 , 吴丽君 , 陈志聪 et al. 损失自适应的高感知质量生成对抗超分辨率网络 [J]. | 福州大学学报（自然科学版） , 2025 , 53 (1) : 26-34 . |
| MLA | 林旭锋 et al. "损失自适应的高感知质量生成对抗超分辨率网络" . | 福州大学学报（自然科学版） 53 . 1 (2025) : 26-34 . |
| APA | 林旭锋 , 吴丽君 , 陈志聪 , 林培杰 , 程树英 . 损失自适应的高感知质量生成对抗超分辨率网络 . | 福州大学学报（自然科学版） , 2025 , 53 (1) , 26-34 . |
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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. (c) 2024 Optica Publishing Group. All rights, including for text and data mining (TDM), Artificial Intelligence (AI) training, and similar technologies, are reserved.
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| GB/T 7714 | Chen, Can , Yu, Jinling , Kang, Chen et al. Chiral optical modulation of Si-Ge2Sb2Te5 2 Sb 2 Te 5 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 2 Sb 2 Te 5 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 2 Sb 2 Te 5 composite metasurfaces driven by quasi-bound states in the continuum . | APPLIED OPTICS , 2024 , 63 (29) , 7682-7691 . |
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Efficient ternary organic solar cells were achieved by utilizing an ultra-narrow bandgap material, IEICO-4 F, mixed with the fullerene material PC71BM as the acceptor and PTB7-Th polymer as the donor. The different weights of IEICO-4 F were dropped into the active layer to adjust the ratio of acceptor and donor, optimizing the performance of the cells. The results showed the ternary organic solar cells with 10wt% IEICO-4 F could obtain a higher short-circuit current density resulting in the power conversion efficiency (PCE) up to 9.56%. MoO3/Ag/MoO3 as the transparent electrodes of the semitransparent organic solar cell (ST-OSCs) were prepared. The different thicknesses of Ag impacts on the performance of the ST-OSCs were investigated. The PCE of the ternary ST-OSCs was increased to 7.34% and the average visible light transmittance (AVT) was increased to 28.74% when Ag was 10 nm thickness. The ternary ST-OSCs presented both a good light transmittance and a high PCE. In addition, the light utilization efficiency of the ST-OSCs was increased to 2.1%, and the color reproduction index was improved too. The PCE and AVT of the ST-OSCs could improve simultaneously due to the appropriate ratio of the acceptor and donor as well as the optimized transparent electrodes.
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| GB/T 7714 | Zheng, Qiao , Zhou, Hui , Du, Shunli et al. Efficiency and average visible light transmittance improved simultaneously of the semitransparent organic solar cells [J]. | JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS , 2024 , 35 (6) . |
| MLA | Zheng, Qiao et al. "Efficiency and average visible light transmittance improved simultaneously of the semitransparent organic solar cells" . | JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS 35 . 6 (2024) . |
| APA | Zheng, Qiao , Zhou, Hui , Du, Shunli , Chen, Pengsen , Huang, Jingang , Deng, Hui et al. Efficiency and average visible light transmittance improved simultaneously of the semitransparent organic solar cells . | JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS , 2024 , 35 (6) . |
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The high photovoltaic conversion efficiency (PCE) of ternary organic solar cells (OSCs) based on PTB7-Th, PC71BM and IEICO-4F material is obtained, the short-circuit current density (J SC), fill factor (FF), and open-circuit voltage is 25.90 mA cm-2, 73.20% and 0.71 V, respectively. PCE is as high as 13.53%. It is the highest PCE of ternary OSCs based on PTB7-Th, PC71BM and IEICO-4F materials for all we know. The narrow bandgap material of IEICO-4F is deposited on PTB7-Th:PC71BM bulk heterojunction (BHJ) by layer-by-layer process. We constructed the dual bandgap active layer both BHJ and pseudo-planar heterojunction (P-PHJ), it could be defined as ternary BHJ/P-PHJ of OSCs. This type of OSCs is not only the complementary bandgap material of the active layer, but also increasing the donor/acceptor (D/A) interface. The excitons generation and collection of the device are increased leading a higher J SC and FF. The semitransparent OSCs (ST-OSCs) is prepared by varying the thickness of Ag electrode and PCE can reach 9.70%, and the average visible light transmittance and light use efficiency of ST-OSCs are improved effectively.
Keyword ：
bulk heterojunction bulk heterojunction donor/acceptor interface donor/acceptor interface dual bandgap active layer dual bandgap active layer layer-by-layer layer-by-layer pseudo-planar heterojunction pseudo-planar heterojunction ternary organic solar cells ternary organic solar cells
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| GB/T 7714 | Zheng, Qiao , Zhou, Hui , Guo, Zhaohuang et al. Improved performance of ternary organic solar cells based on both bulk and pseudo-planar heterojunction active layer [J]. | JOURNAL OF PHYSICS D-APPLIED PHYSICS , 2024 , 57 (31) . |
| MLA | Zheng, Qiao et al. "Improved performance of ternary organic solar cells based on both bulk and pseudo-planar heterojunction active layer" . | JOURNAL OF PHYSICS D-APPLIED PHYSICS 57 . 31 (2024) . |
| APA | Zheng, Qiao , Zhou, Hui , Guo, Zhaohuang , Zhuang, Jinyong , Deng, Hui , Wu, Jionghua et al. Improved performance of ternary organic solar cells based on both bulk and pseudo-planar heterojunction active layer . | JOURNAL OF PHYSICS D-APPLIED PHYSICS , 2024 , 57 (31) . |
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