ADVANCED MATERIALS
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2024
·Vol. 36
·期 26
·2307330
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IF 27.4
Youan Xu,Ziyang Huang,Zehao Zhang,Baofu Ding,Peixuan Li,Jiarong Liu,Yugan Hao,Lixin Dai,Hao Zhang,Caizhen Zhu,Wei Cai,Bilu Liu
Achieving light modulation in the spectral range of 200–280 nm is a prerequisite for solar-blind ultraviolet communication, where current technologies are mainly based on the electro-luminescent self-modulation of the ultraviolet source. External light modulation through the electro-birefringence control of liquid crystal (LC) devices has shown success in the visible-to-infrared regions. However, the poor stability of conventional LCs against ultraviolet irradiation and their weak electro-optical response make it challenging to modulate ultraviolet light. Here, an external ultraviolet light modulator is demonstrated using two-dimensional boron nitride LC. It exhibits robust ultraviolet stability and a record-high specific electro-optical Kerr coefficient of 5.1 × 10⁻ 2 m V −2 , being three orders of magnitude higher than those of other known electro-optical media that are transparent (or potentially transparent) in the ultraviolent spectral range. The sensitive response enables fabricating transmissive and stable ultraviolet-C electro-optical Kerr modulators for solar-blind ultraviolet light. An M-ary coding array with high transmission density is also demonstrated for solar-blind ultraviolet communication.
研究领域:
材料科学
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光学工程
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通信技术
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Qian Zhang,Zhuolin Guo,Tuo Li,Beijia Zhao,Jun Dong
Here, we investigate the third-order nonlinear optical (NLO) response of the phenol red (PR) dye solution under cw excitation at 532 nm employing the spatial self-phase modulation (SSPM) method. The results show that two types of diffraction rings (narrow and wide) are produced in the far field , which are attributed to the Kerr effect and Thermal optical nonlinear effect . In addition, the NLO properties of the PR dye under various pH conditions are investigated. Compared with the PR dye solution, the nonlinear refractive index coefficients induced by Kerr effect and Thermal optical nonlinear effect of protonated-PR (P-PR) dye increased by 2.23 and 2.76 times, respectively. These phenomena are explained by the enhanced π-electron delocalization, and the redshift and enhancement of the absorption peak caused by π-π* transitions. Finally, all-optical switching in the PR dye solution is realized based on the Thermal optical nonlinear effect. These findings not only provide a significant reference to tailor nonlinear optical properties of PR dye solutions, but also make PR dye promising candidates in photonic devices applications.
研究领域:
光学材料
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光子学
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非线性光学
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分子光谱学
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功能染料化学
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产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Jun Zhu,Songrui Wei,Jie Tang,Yi Hu,Xiaoyu Dai,You Zi,Mengke Wang,Yuanjiang Xiang,Weichun Huang
Recently, novel two-dimensional materials, e.g., Xenes (graphdiyne, phosphorene, bismuthene, antimonene, etc.) and MXenes, have drawn great attention in nanophotonics due to their excellent flexibility, high photothermal conversion efficiency, and large thermal conductivity. Although the Xenes and MXenes have achieved rapid progress in many fields over the past decade, their relatively poor photodetection and nonlinear photonics have still limited their practical applications. In this work, a mixed-dimensional 2D MXene V2CTx nanosheet (NS)/0D bismuth quantum dot (Bi QD)-based heterostructure fabricated by a combination of selective etching and the hydrothermal method was simply deposited onto a clean poly(ethylene terephthalate) substrate with an embedded regular Ag lattice to prepare a flexible photoelectrochemical (PEC) electrode. The PEC result shows that the as-fabricated flexible electrode not only exhibits significantly improved photocurrent density (32.7 μA cm–2) and photoresponsivity (906 μA W–1) compared to individual MXene V2CTx NSs and Bi QDs but also displays high stability with a stable photocurrent density even after 200 bending cycles at 60°. Taking advantage of the Kerr effect of both MXene V2CTx NSs and Bi QDs, an all-optical switcher based on this mix-dimensional heterostructure for the spatial cross-phase modulation has also been realized with a preferred modulation depth. Density functional theory calculations provide direct evidence for the strong internal built-in electric field (7.3 × 107 eV m–1) created by the heterostructure for the enhancement of both photodetection and nonlinear photonics. The integration of Xenes or MXene-based mixed-dimensional heterostructures provides a concept and fundamental guidance to construct next-generation optoelectronic and photonic devices.
研究领域:
纳米光子学
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材料科学
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光电
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光子学
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产品关联
DOI
高影响因子
Nature Physics
·
2024
·Vol. 20
·期 7
·1145-1151
·
IF 17.6
Li Xiaoyin,Liu Caixing,Zhang Ying,Zhang Shunhong,Zhang Huisheng,Zhang Yuchen,Meng Wenjie,Hou De,Li Tao,Kang Chaoyang,Huang Fanyang,Cao Ruiguo,Hou Dazhi,Cui Ping,Zhang Weifeng,Min Tai,Lu Qingyou,Xu Xiaohong,Sheng Zhigao,Xiang Bin,Zhang Zhenyu
The whorls of localized moments in chiral magnetic structures, such as skyrmions, lead to a quantized topological charge, which may make them useful as next-generation information bits. So far, the most reliable way to detect the existence of skyrmions is by using the topological Hall effect, which stems from electron scattering by the emergent magnetic field manifesting the topological charge. Here we employ two-dimensional magnets to establish a magneto-optical hallmark of skyrmions, which we call the topological Kerr effect, using the recently discovered ferromagnet CrVI 6 as a material platform. The Kerr angle hysteresis loop of this non-centrosymmetric system exhibits two antisymmetric bumps that are absent in the centrosymmetric CrI 3 and VI 3 . We develop a minimal model to further identify the bumps as direct manifestations of the topological charge, thereby providing a magneto-optical fingerprint of skyrmions with broader applicability.
研究领域:
凝聚态物理学
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材料科学
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磁学
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DOI
高影响因子
ADVANCED MATERIALS
·
2025
·Vol. 37
·期 43
·e09037
·
IF 26.8
Yanchang Zhou,Ruiqing Cheng,Shuyang Yuan,Xiaoqiang Feng,Yushan Zhu,Sheng Jiang,Hao Wang,Lei Yin,Yao Wen,Wei Liu,Jun He
2D magnetic materials offer significant potential for advanced spintronics, but their practical implementation is hindered by fundamental limitations such as low Curie temperatures and the current inability to achieve scalable, large-area synthesis. Herein, a significant breakthrough in the centimeter-scale epitaxial growth of ultrathin single-crystalline magnetic ferrite films, including cobalt ferrite, manganese ferrite, and nickel ferrite is reported. By leveraging symmetry-matching-induced energy splitting between antiparallel orientations and developing a precisely engineered nucleation timing strategy to amplify synergistic coupling, unidirectional epitaxial growth with seamless domain coalescence is achieved. Comprehensive macro- and micro-characterizations confirmed the single-crystalline nature and high quality. Vibrating sample magnetometry measurements reveal robust ferrimagnetism persisting up to 730 K, while magneto-optical Kerr effect microscopy visualized sharp uniform single-domain switching behavior. Interestingly, two potential strategies have been explored for heteroepitaxial integration of CFO thin films with engineered substrates. This work establishes a scalable and viable synthesis route for 2D magnetic oxides, marking a pivotal step toward their practical deployment in high-performance spintronic and quantum devices.
研究领域:
材料科学
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凝聚态物理
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自旋电子学
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纳米技术
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薄膜生长
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产品关联
DOI
PubMed
高影响因子
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