相干堆叠氮化硼纳米管中的强自旋非线性

IF 38.1 1区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Nature nanotechnology Pub Date : 2024-06-06 DOI:10.1038/s41565-024-01685-3
Chaojie Ma, Chenjun Ma, Chang Liu, Quanlin Guo, Chen Huang, Guangjie Yao, Meiyun Li, Jiajie Qi, Biao Qin, Xin Sui, Jiacheng Li, Muhong Wu, Peng Gao, Wenlong Wang, Xuedong Bai, Zhipei Sun, Enge Wang, Hao Hong, Kaihui Liu
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引用次数: 0

摘要

对于先进的微型化光学和光电应用而言,具有较大自旋响应和较高结构稳定性的纳米材料是理想之选。一维(1D)纳米管是一种坚固的晶体,具有固有和持续可调的手性几何结构。然而,由于同轴管的结构多种多样,它们的手电响应通常较弱且难以控制。在这里,我们证明了生长过程中的多壁氮化硼纳米管(BNTs)具有相干堆叠结构,包括各成分管之间的近单色性、同手性和单极性,表现出了可扩展的非线性自旋响应。这种固有结构在单个多壁 BNNT 中产生了强烈的非线性光学响应,使二次谐波发生(SHG)的转换效率高达 0.01%,输出功率达到微瓦级--这两项指标在一维纳米材料家族中均属上乘。我们进一步表明,纳米管丰富的手性引入了可控的非线性几何相位,产生了手性相关的 SHG 圆二色性,其值为 -0.7 到 +0.7。我们设想,我们的一维手性平台将为紧凑型非线性光源和调制器带来新的功能。
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Strong chiroptical nonlinearity in coherently stacked boron nitride nanotubes
Nanomaterials with a large chiroptical response and high structural stability are desirable for advanced miniaturized optical and optoelectronic applications. One-dimensional (1D) nanotubes are robust crystals with inherent and continuously tunable chiral geometries. However, their chiroptical response is typically weak and hard to control, due to the diverse structures of the coaxial tubes. Here we demonstrate that as-grown multiwalled boron nitride nanotubes (BNNTs), featuring coherent-stacking structures including near monochirality, homo-handedness and unipolarity among the component tubes, exhibit a scalable nonlinear chiroptical response. This intrinsic architecture produces a strong nonlinear optical response in individual multiwalled BNNTs, enabling second-harmonic generation (SHG) with a conversion efficiency up to 0.01% and output power at the microwatt level—both excellent figures of merit in the 1D nanomaterials family. We further show that the rich chirality of the nanotubes introduces a controllable nonlinear geometric phase, producing a chirality-dependent SHG circular dichroism with values of −0.7 to +0.7. We envision that our 1D chiral platform will enable novel functions in compact nonlinear light sources and modulators. Multiwalled boron nitride nanotubes, featuring coherently stacked structures with monochirality, homo-handedness and unipolarity among the component tubes, show a large nonlinear chiroptical response.
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来源期刊
Nature nanotechnology
Nature nanotechnology 工程技术-材料科学:综合
CiteScore
59.70
自引率
0.80%
发文量
196
审稿时长
4-8 weeks
期刊介绍: Nature Nanotechnology is a prestigious journal that publishes high-quality papers in various areas of nanoscience and nanotechnology. The journal focuses on the design, characterization, and production of structures, devices, and systems that manipulate and control materials at atomic, molecular, and macromolecular scales. It encompasses both bottom-up and top-down approaches, as well as their combinations. Furthermore, Nature Nanotechnology fosters the exchange of ideas among researchers from diverse disciplines such as chemistry, physics, material science, biomedical research, engineering, and more. It promotes collaboration at the forefront of this multidisciplinary field. The journal covers a wide range of topics, from fundamental research in physics, chemistry, and biology, including computational work and simulations, to the development of innovative devices and technologies for various industrial sectors such as information technology, medicine, manufacturing, high-performance materials, energy, and environmental technologies. It includes coverage of organic, inorganic, and hybrid materials.
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