1 中国科学院 长春光学精密机械与物理研究所, Bimberg中德绿色光子学研究中心, 吉林 长春  130033
2 中国科学院大学, 北京  100049
3 中国科学院 长春光学精密机械与物理研究所, 发光学及应用国家重点实验室, 吉林 长春  130033
4 柏林工业大学 固体物理研究所, 纳米光学中心, 德国柏林  D-10623
光子晶体 高速 面发射激光器 photonic crystal high-speed surface-emitting laser 
2024, 45(3): 484
Author Affiliations
Northwestern Polytechnical University, School of Physical Science and Technology, MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions, Key Laboratory of Light-Field Manipulation and Information Acquisition, Ministry of Industry and Information Technology, Shaanxi Key Laboratory of Optical Information Technology, Xi’an, China
Optical cavities play crucial roles in enhanced light–matter interaction, light control, and optical communications, but their dimensions are limited by the material property and operating wavelength. Ultrathin planar cavities are urgently in demand for large-area and integrated optical devices. However, extremely reducing the planar cavity dimension is a critical challenge, especially at telecommunication wavelengths. Herein, we demonstrate a type of ultrathin cavities based on large-area grown Bi2Te3 topological insulator (TI) nanofilms, which present distinct optical resonance in the near-infrared region. The result shows that the Bi2Te3 TI material presents ultrahigh refractive indices of >6 at telecommunication wavelengths. The cavity thickness can approach 1/20 of the resonance wavelength, superior to those of planar cavities based on conventional Si and Ge high refractive index materials. Moreover, we observed an analog of the electromagnetically induced transparency (EIT) effect at telecommunication wavelengths by depositing the cavity on a photonic crystal. The EIT-like behavior is derived from the destructive interference coupling between the nanocavity resonance and Tamm plasmons. The spectral response depends on the nanocavity thickness, whose adjustment enables the generation of obvious Fano resonance. The experiments agree well with the simulations. This work will open a new door for ultrathin cavities and applications of TI materials in light control and devices.
topological insulator optical nanocavity photonic crystal electromagnetically induced transparency-like effect 
Advanced Photonics
2024, 6(3): 036001
兰州交通大学 电子与信息工程学院, 甘肃 兰州 730070
在二维光子晶体中嵌入了线缺陷,利用线性干涉效应和波导耦合,设计了一种基于二维光子晶体的同或门和与非门结构。主要采用平面波展开法对该二维光子晶体的能带结构进行分析,采用时域有限差分法,结合线性干涉效应,在Rsoft平台对所设计的同或门和与非门进行稳定电场图和归一化功率仿真。仿真结果标明:设计的同或门对比度高达29.5 dB,响应时间为0.073 ps,数据传输速率为13.7 Tbit/s;设计的与非门对比度高达24.15 dB,响应时间为0.08 ps,数据传输速率为12.5 Tbit/s。这些结果表明所设计的结构对比度高、响应时间短和数据传输速率快。
光子晶体 逻辑门 时域有限差分法 干涉 对比度 photonic crystal logic gate finite difference time domain method interference contrast 
2024, 17(1): 245
1 中国计量大学光学与电子科技学院,浙江 杭州 310018
2 中国电子科技集团公司第四十一研究所,山东 青岛 266555
采用光束传播法对双芯光子晶体光纤中光纤结构参数对纤芯间耦合效率的影响进行分析。首先,根据双芯耦合原理,使用最小二乘法对波导间的耦合系数等参数进行估计,明确孔间距、纤芯折射率差、中央空气孔直径比例、纤芯直径比例、空气孔直径比例和空气孔对称度等参数对双芯光子晶体光纤耦合比及耦合区长度的调节作用,提出一种基于双芯光子晶体光纤的耦合器性能粗调与微调设计方法。然后,根据这一耦合器设计方法,提出一种非对称的双芯光子晶体光纤宽带定向耦合器。该耦合器在1.31~1.55 μm区间实现了50%±5%的耦合比,带宽为240 nm,并具有3 mm的超短耦合长度。本研究成果可为光纤宽带定向耦合器的高效设计提供有意义的参考。
光纤光学 双芯光子晶体光纤 光束传播法 耦合效率 宽带耦合器 
2024, 44(5): 0506004
Author Affiliations
1 China University of Mining and Technology, School of Materials and Physics, Xuzhou, China
2 Southeast University, State Key Laboratory of Millimeter Waves, Nanjing, China
3 Soochow University, School of Physical Science and Technology and Collaborative Innovation Center of Suzhou Nano Science and Technology, Suzhou, China
4 Soochow University, Institute for Advanced Study, Suzhou, China
The pseudo-magnetic field, an artificial synthetic gauge field, has attracted intense research interest in the classical wave system. The strong pseudo-magnetic field is realized in a two-dimensional photonic crystal (PhC) by introducing the uniaxial linear gradient deformation. The emergence of the pseudo-magnetic field leads to the quantization of Landau levels. The quantum-Hall-like edge states between adjacent Landau levels are observed in our designed experimental implementation. The combination of two reversed gradient PhCs gives rise to the spatially nonuniform pseudo-magnetic field. The propagation of the large-area edge state and the interesting phenomenon of the snake state induced by the nonuniform pseudo-magnetic field is experimentally demonstrated in a PhC heterostructure. This provides a good platform to manipulate the transport of electromagnetic waves and to design useful devices for information processing.
photonic crystal pseudo-magnetic field edge state snake state 
Advanced Photonics Nexus
2024, 3(2): 026011
1 College of Science, Hunan Province Key Laboratory of Materials Surface & Interface Science and Technology, Central South University of Forestry and Technology, Changsha 410004, Hunan, China
2 College of Science, Jiujiang University, Jiujiang 332005, Jiangxi, China
The immunity of topological states against backscattering and structural defects provides them with a unique advantage in the exploration and design of high-precision low-loss optical devices. However, the operating bandwidth of the topological states in certain photonic structures is difficult to actively tune and flexibly reconfigure. In this study, we propose a valley topological photonic crystal (TPC) comprising two inverse honeycomb photonic crystals, consisting of hexagonal silicon and Ge2Sb2Te5 (GST) rods. When GST transitions from the amorphous phase to the crystalline phase, the edge band of the TPC appears as a significant redshift and is inversed from a"∪"to an"∩"shape with topological phase transition, which enables active tuning of the operating bandwidth and propagation direction of topological edge states. Both the topological edge and corner states in a triangular structure constructed using TPCs can be simultaneously adjusted and reconfigured via GST phase transition, along with a change in the group number of corner states. Using the adjustability of topological edge states and electromagnetic coupling between two different topological bearded interfaces, we develop a multichannel optical router with a high tuning degree of freedom, where channels can be actively reconfigured and their on/off states can be freely switched. Our study provides a strategy for the active regulation of topological states and may be beneficial for the development of reconfigurable topological optical devices.
topological edge states topological corner states phase change material active reconfiguration topological photonic crystal 
2024, 61(5): 0536001
郑州大学电气与信息工程学院河南省激光与光电信息技术重点实验室,河南 郑州 450001
光子晶体 光子Moiré超晶格 多光束干涉 平带 光局域 
2024, 44(4): 0431001
Jiajun Wang 1†Peishen Li 2Xingqi Zhao 1Zhiyuan Qian 2[ ... ]Jian Zi 1,4,5,6,*
Author Affiliations
1 State Key Laboratory of Surface Physics, Key Laboratory of Micro- and Nano-Photonic Structures (Ministry of Education) and Department of Physics, Fudan University, Shanghai, China
2 State Key Laboratory of Advanced Optical Communication Systems and Networks, School of Electronics, Peking University, Beijing, China
3 College of Physics, Chongqing University, Chongqing, China
4 Institute for Nanoelectronic devices and Quantum computing, Fudan University, Shanghai, China
5 Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China
6 Shanghai Research Center for Quantum Sciences, Shanghai, China
Optical bound states in the continuum (BICs) have recently stimulated a research boom, accompanied by demonstrations of abundant exotic phenomena and applications. With ultrahigh quality (Q) factors, optical BICs have powerful abilities to trap light in optical structures from the continuum of propagation waves in free space. Besides the high Q factors enabled by the confined properties, many hidden topological characteristics were discovered in optical BICs. Especially in periodic structures with well-defined wave vectors, optical BICs were discovered to carry topological charges in momentum space, underlying many unique physical properties. Both high Q factors and topological vortex configurations in momentum space enabled by BICs bring new degrees of freedom to modulate light. BICs have enabled many novel discoveries in light–matter interactions and spin–orbit interactions of light, and BIC applications in lasing and sensing have also been well explored with many advantages. In this paper, we review recent developments of optical BICs in periodic structures, including the physical mechanisms of BICs, explored effects enabled by BICs, and applications of BICs. In the outlook part, we provide a perspective on future developments for BICs.
bound state in the continuum light trapping topological charge polarization vortex momentum space light field manipulation photonic crystal slab nanophotonics 
Photonics Insights
2024, 3(1): R01
Author Affiliations
1 State Key Laboratory of Advanced Optical Communication Systems and Networks, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
2 School of Physics, Ningxia University, Yinchuan 750021, China
3 Shanghai Research Center for Quantum Sciences, Shanghai 201315, China
4 Collaborative Innovation Center of Light Manipulations and Applications, Shandong Normal University, Jinan 250358, China
Lithium niobate is a material that exhibits outstanding electro-optic, nonlinear optical, acousto-optic, piezoelectric, photorefractive, and pyroelectric properties. A thin-film lithium niobate photonic crystal can confine light in the sub-wavelength scale, which is beneficial to the integration of the lithium niobate on-chip device. The commercialization of the lithium niobate on insulator gives birth to the emergence of high-quality lithium niobate photonic crystals. In order to provide guidance to the research of lithium niobate photonic crystal devices, recent progress about fabrication, characterization, and applications of the thin-film lithium niobate photonic crystal is reviewed. The performance parameters of the different devices are compared.
lithium niobate photonic crystal integrated optics 
Chinese Optics Letters
2024, 22(3): 033602
中国科学院上海光学精密机械研究所,上海 201800
掺镱大模场光子晶体光纤在高峰值功率超快激光放大器中有着重要的应用价值,其研究得到了广泛关注。首先简要介绍了国内外掺镱大模场光子晶体光纤的研究进展,阐述了掺镱大模场光子晶体光纤的基本设计思路,对比说明了保偏型掺镱光子晶体光纤的设计制备方法。重点介绍了近十年来中国科学院上海光学精密机械研究所在掺镱大模场光子晶体光纤方面的研究进展。包括掺镱大模场光子晶体光纤的纤芯折射率大小和均匀性控制、光子晶体光纤微结构控制等关键技术。采用自主研制的四种芯径为40~100 μm的掺镱大模场光子晶体光纤开展了皮秒脉冲激光放大实验。利用40 μm芯径的保偏掺镱光子晶体光纤实现了平均功率为100 W、光束质量因子(M2)小于1.4的稳定输出,偏振消光比为12 dB。利用100 μm芯径的保偏掺镱大模场光子晶体光纤实现了M2小于1.5的高光束质量脉冲放大。上述研究为掺镱大模场光子晶体光纤的国产化应用奠定了基础。
光纤光学 掺镱石英玻璃 大模场光子晶体光纤 皮秒脉冲激光放大 光纤激光 
2024, 51(1): 0106001

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