共查询到20条相似文献，搜索用时 15 毫秒
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Xu Li Haiyang Liu Congming Ke Weiqing Tang Mengyu Liu Feihong Huang Yaping Wu Zhiming Wu Junyong Kang 《Laser u0026amp; Photonics Reviews》2021,15(12):2100322
Anisotropic 2D materials are promising building blocks for future photonic and optoelectronic devices due to their low structural symmetry and in-plane optical anisotropy. This review systematically summarizes the crystalline structure, growth dynamics, optical anisotropy and their modulation strategies, and the corresponding photonic applications for emerging anisotropic 2D materials. First, the physical properties and crystalline structures of typical anisotropic 2D materials are briefly introduced. After that, special attention is paid to the growth mechanism of low-symmetry lattices, where the competition between different growth modes determines the crystal morphologies. Then, the physical principles of anisotropic optical absorption, photoluminescence, Raman scattering, photodetection, and nonlinear response are discussed based on recent scientific advances. The discussion on the techniques to modify the intrinsic in-plane anisotropy, along with the possibility of introducing optical anisotropy to the isotropic materials, add a new degree of freedom to the control over their optical properties. The review of application prospects also helps bridge the gap between the scientific exploration of novel anisotropic materials and the development of polarization-sensitive photonic devices. The discussions in this review will push forward the scientific frontier in the crystalline growth and anisotropy control of anisotropic 2D materials. 相似文献
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Duc Minh Nguyen Thanh Nam Nguyen Thierry Chartier Monique Thual 《Fiber and Integrated Optics》2013,32(4):225-238
Abstract A novel and simple procedure to improve the accuracy of the measurement of the third-order Kerr non-linear coefficient of optical fibers based on self-phase modulation is described. It includes an efficient method to identify the chirp of the input pulse. A standard single-mode fiber and a highly non-linear microstructure chalcogenide fiber have been measured. The accuracy of the measurement is increased to ±5% instead of ±19% with the classical self-phase modulation method in this case. 相似文献
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2D metal‐organic frameworks (MOFs) have attracted broad research interest in recent years owing to their unique dimension‐related properties for widespread applications in catalysis, energy storage, conductivity, and optoelectronic devices. In this review, first the strategies for the rational design and precise construction of 2D MOFs are introduced. Then, the synthesis of 2D MOFs and their nanosheets by using top‐down and bottom‐up methods are summarized. Subsequently, the recent advances in optical/photonic applications of these 2D MOFs are highlighted, with special focus on lighting and display devices, nonlinear optics, as well as the luminescent sensing and biomedicine applications. Finally, the future potentials and challenges for the construction of 2D MOFs for optical materials are outlooked. 相似文献
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Wenjun Liu Mengli Liu Ximei Liu Xiaoting Wang Hui‐Xiong Deng Ming Lei Zhongming Wei Zhiyi Wei 《Advanced Optical Materials》2020,8(8)
The explosive success of graphene opens a new era of ultrathin 2D materials. It has been realized that the van der Waals layered materials with atomic and less atomic thickness can not only exist stably, but also exhibit unique and technically useful properties including small size effect, surface effect, macro quantum tunnel effect, and quantum effect. With the extensive research and revealing of the basic optical properties and new photophysical properties of 2D materials, a series of potential applications in optical devices have been continuously demonstrated and realized, which immediately roused an upsurge of study in the academic circle. Therefore, the application of 2D materials as broadband, efficient, convenient, and versatile saturable absorbers in ultrafast lasers is a potential and promising field. Herein, the main preparation methods of 2D materials are reviewed and technical guidelines for identifying and characterizing layered 2D materials are provided. After investigating the characteristics of 2D materials thoroughly in nonlinear optics, their performances in fiber lasers are comprehensively summarized according to the types of materials. Finally, some developmental challenges, potential prospects, and future research directions are summarized and presented for such promising materials. 相似文献
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系统介绍了几种基于瞬态光克尔效应的超快光学快门技术,包括传统的光克尔双折射快门技术,瞬态光栅快门技术,以及利用瞬态克尔透镜效应的光学快门技术。这些技术都是在泵浦-探测的实验配置基础上,利用门控光对克尔介质折射率的瞬态调制导致的信号光的相位（偏振态）、传播方向或光束发散角等光学特性的改变实现对信号光的超快时间分辨测量。对比讨论了这些超快快门技术的工作原理和实验配置,结果表明瞬态光束偏折快门技术相比其他快门技术具有无偏振配置要求、无相位匹配条件、超宽带光谱响应范围的特点,在光与物质相互作用的超快动力学研究中具有更为广阔的应用前景。 相似文献
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提出了一种利用双周期弧向非满额相位调制的方法产生双空心光束的方案. 当准直氦氖激光通过1.5 mm半径透光孔照射到该相位图样时, 在200 mm成像透镜像空间获得长30 mm, 间距57.6μm, 单管束宽度0.11–0.14 mm的双空心光束. 该方案结构简单, 产生的双空心光束具有较好的可控性, 双光管间距由相位调制因子p决定, 能够实现从双空心光束到单空心光束的双向演化. 对所提出的方案进行了实验研究并得到与理论相符的结果. 利用多种组合方式讨论了将该方案拓展到蓝失谐光学囚禁势阱, 可以实现可控的空心双光阱、四光阱与光学晶格等, 有望在冷原子、冷分子囚禁与操控等领域的实验研究中发挥重要作用. 相似文献
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Electrochromic materials and devices have attracted much attention with their ability to tune the transmissions of visible to infrared (IR) light, allowing the creation of smart windows. This study presents a novel electrochromic device (ECD)‐based photonic device that can modulate IR light intensity in a planar optical waveguide ECD. To configure it, a multilayer ECD made of WO3 is integrated on a polymer optical waveguide platform. By using the waveguide to change the optical properties of the ECD electrically, IR light propagating along the optical waveguide core undergoes electroabsorption loss due to the change in charge carrier density in WO3 layer and its intensity is modulated with an extinction depth of 0.6 dB mm−1. Experimental results show that the device is capable of discrete intensity attenuation by applying a distinct level gate voltage. Periodic application of gate voltage leads the device to serve as an optical modulator on the order of subseconds. The results also confirm that a new approach to consider ECD‐based optical modulators can pave the way for the development of planar photonic‐integrated circuits and systems. 相似文献
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Yang Gao Cheng Ling Danyi Weng Guanghao Rui Jun He Bing Gu 《Laser u0026amp; Photonics Reviews》2024,18(5):2301062
The spatial self-phase modulation (SSPM) of phosphorus-based nanomaterials is widely studied and developed as passive nonlinear photonic devices for applications in all-optical switches, logic gates, information converters, etc. In this work, violet phosphorus quantum dots (VP QDs) are prepared and characterized in three different solvents, their SSPM is investigated, and their spatial asymmetric light propagation performances are demonstrated. It is shown that VP QDs prepared in three different solvents exhibit different bandgaps, mainly due to the interaction between the dangling bonds of VP QDs and functional groups in different solvents. The SSPM experiment characterizes the nonlinear optical response of solvent-dependent VP QDs. It is found that VP QDs exhibit strong nonlinear optical effect and their nonlinear refractive indexes are comparable to other phosphorus-based 2D materials. Unlike the previously reported principle of spatial asymmetric light propagation (i.e., a cascaded sample based on SSPM composed of nanomaterials with excellent nonlinear refraction and SnS2 with reverse saturation absorption), the spatial asymmetric light propagation performance based on SSPM is demonstrated using a cascaded sample of VP QDs with significantly different nonlinear optical response prepared in two different solvents. 相似文献
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《Advanced Optical Materials》2018,6(18)
The gyroid “srs” network is a bio‐inspired, 3D periodic network with both cubic symmetry and chirality, which is modeled (and named) after the SrSi2 crystal. It is an excellent starting point for the development of chiral photonic materials and a powerful platform for the study of complex morphologies and novel photonic topological states. In this Progress Report, the most advanced top‐down fabrication techniques, characterization methods, and applications of metallic and dielectric gyroid micro and nanostructures are reviewed. More importantly, new research directions involving these bio‐inspired photonic materials are presented and their potential applications in integrated photonics, topological photonics, and medical sciences are discussed. 相似文献
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非局域克尔介质中空间光孤子的相互作用 总被引：20，自引：2，他引：20
研究了强非局域克尔介质中光束的演化规律,通过相位分析得到了空间孤子相互作用所满足 的非局域非线性薛定谔方程的简化近似模型,并获得了双光束传输的解析解.结果表明在传 输过程中相互作用的高斯光束的相位决定于它们的输入总功率.以振幅一强一弱共同传输的 高斯光束为例进行了具体研究,得到了强光和弱光的解析式,相位分析显示弱光在相当短的 传输距离之内能产生大的相移,可以通过对强光能量的调控来实现对弱光的相位调制. 关键词：非局域克尔介质空间光孤子孤子相互作用相位调制 相似文献
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《Advanced Optical Materials》2017,5(20)
An ultralow‐power all‐optical logic data distributor with dual address bits is realized. The device is constructed from three silicon slot ring resonators, which are side coupled to silicon slot waveguides and coated with a nonlinear nanocomposite material made of upconversion nanoparticles dispersed in an organic conjugated polymer matrix. A large nonlinearity enhancement occurs in the nanocomposite material through resonant excitation via an upconversion radiative‐transfer process, which ensures an ultralow operating threshold control intensity of 10 kW cm−2. This result represents a reduction of five orders of magnitude compared with previous reports. An ultrafast response time of several picoseconds is simultaneously maintained based on structural defects inducing ultrafast decay of excited‐state carriers. The intensity contrast ratio between the output logic states “1” and “0” is larger than 20 dB, which is a fivefold increase compared with previous reports. This work may pave the way for the realization of real‐time multibit all‐optical computing chips. 相似文献
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