Review
Chemistry, Multidisciplinary
Michael S. Lodge, Shengyuan A. Yang, Shantanu Mukherjee, Bent Weber
Summary: Atomically thin topological materials, such as the quantum spin Hall insulator, show great potential for applications in quantum computing and electronic devices, with large tunable bulk bandgaps and gapless edge states.
ADVANCED MATERIALS
(2021)
Article
Optics
Zefeng Chen, Hongwei Yang, Yihong Xiao, Jintao Pan, Yu Xia, Wenguo Zhu
Summary: By calculating the optical conductivities of twisted bilayer graphene and studying the light-matter interaction, we investigated the photonic spin Hall effect in this material. Placing the graphene on a substrate and launching a Gaussian beam near the Brewster angle enhanced the effect, revealing the spin splitting and Goos-Hanchen shifts associated with the surface conductivities. These findings deepen our understanding and indicate potential applications in characterizing bilayer graphene.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION
(2021)
Article
Nanoscience & Nanotechnology
Minkyung Kim, Dasol Lee, Yeseul Kim, Junsuk Rho
Summary: This study proposes nanophotonic-assisted approaches to increase the precision of weak measurement by controlling the spin Hall effect of light. The refractive index sensing experiment proves the feasibility of the method, and a single-layer metasurface is introduced as an experimental platform.
Article
Physics, Applied
Shizhen Chen, Xinxing Zhou, Xiaohui Ling, Weixing Shu, Hailu Luo, Shuangchun Wen
Summary: The study demonstrates the use of photonic spin Hall effect in MoS2 to investigate atomic light-matter interaction, providing a reliable approach for fast and precise measurement of optical parameters, particularly useful for studying optical properties of transition metal dichalcogenides.
APPLIED PHYSICS LETTERS
(2021)
Article
Nanoscience & Nanotechnology
Yougang Ke, Yongfeng Bian, Qiang Tang, Jibo Tian, Linzhou Zeng, Yu Chen, Xinxing Zhou
Summary: In this paper, the authors introduce a novel three-dimensional rotational photonic spin Hall effect (PSHE) and demonstrate how to control the rotation angle of the splitting patterns by adjusting the rotation angle of metasurfaces. They also show that the number of lobes in the splitting patterns can be independently controlled by introducing a dynamic phase. These findings enable active manipulation of spin photons in multiple dimensions and may have potential applications in optical microscopy, among other areas.
Article
Multidisciplinary Sciences
Xiaokang Li, Yo Machida, Alaska Subedi, Zengwei Zhu, Liang Li, Kamran Behnia
Summary: We observe a thermal Hall conductivity with a large amplitude in a non-magnetic elemental insulator. The presence of this phenomenon in various insulators suggests a common mechanism, although the absolute amplitude varies greatly. The lack of correlation between the thermal Hall angle and the phonon mean-free-path imposes constraints on theoretical explanations.
NATURE COMMUNICATIONS
(2023)
Review
Quantum Science & Technology
Junji Haruyama
Summary: The study of quantum-spin-Hall (QSH) phase in graphene has attracted considerable attention, especially with the use of heavy adatom decoration and heavy substrates, which provides possibilities for next-generation spintronic architectures.
ADVANCED QUANTUM TECHNOLOGIES
(2022)
Article
Physics, Applied
Junji Haruyama
Summary: The passage primarily introduces the research and applications of 2D topological insulators and quantum spin Hall phases, focusing on their potential applications in dissipationless spintronic devices, as well as the development of innovative quantum devices in atomically thin layers such as graphene.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
R. S. Nair, M. S. Rang, Paul J. Kelly
Summary: A density-functional-theory-based relativistic scattering formalism was used to study charge transport through thin Pt films with room-temperature lattice disorder. The research found that a Fuchs-Sondheimer specularity coefficient is needed to describe the suppression of charge current at the surface, even in the absence of surface roughness. It was also discovered that the spin Hall effect is substantially enhanced at the surface, with a reduced value of the spin Hall angle.
Article
Optics
Axin He, Yi Xu, Baowei Gao, Tongzhou Zhang, Jiasen Zhang
Summary: In this study, broadband subwavelength photonic spin Hall devices (PSHDs) based on L-shaped optical slot antennas were demonstrated, showing small size, broadband response, and flexible design.
LASER & PHOTONICS REVIEWS
(2021)
Article
Optics
Weifang Yang, L. K. Ang, Wentao Zhang, Jiaguang Han, Yi Xu
Summary: In this paper, the sub-wavelength transverse displacement of photonic spin Hall effect (PSHE) is significantly enhanced by the surface exciton polariton (SEP) for application in gas sensing. The transverse displacement of 14.4 times the wavelength of incident light is achieved with the SEP enhanced PSHE, which is about 3 times that of surface plasmon resonance enhanced PSHE. A gas sensor based on SEP enhanced PSHE is proposed for the detection of SO2, and the refractive index sensitivity of 6320.4 μm/RIU is obtained in the refractive index range from 1.00027281 to 1.00095981. These results undoubtedly demonstrate SEP to be a promising mechanism for PSHE enhancement, and open up new opportunities for highly sensitive gas sensing, biosensing, and chemical sensing.
Article
Optics
Xiaohui Ling, Zan Zhang, Zhiping Dai, Zhiteng Wang, Hailu Luo, Lei Zhou
Summary: The physical origin of the photonic spin-Hall effect (PSHE) at optical interfaces is explored through studying the scatterings of circularly polarized beams obliquely incident on a series of junctions. The PSHE is determined by the interplay between the spin-redirection Berry (SRB) phase and the Pancharatnam-Berry (PB) phase. Shrinking the interfacial region can change the PSHE from SRB-dominated to PB-dominated.
LASER & PHOTONICS REVIEWS
(2023)
Article
Optics
Ting Lei, Changyu Zhou, Dawei Wang, Zhenwei Xie, Boyuan Cai, Shecheng Gao, Youpeng Xie, Luping Du, Zhaohui Li, Anatoly Zayats, Xiaocong Yuan
Summary: A chip-integrated nanodisk device is demonstrated for high-speed coherent optical signal detection based on spin-orbit coupling in silicon photonics circuitry. The device can extract phase information through polarization measurements, enabling coherent signal recovery at multiple wavelengths. This technology offers low-cost and small footprint advantages in high-speed coherent optical communication applications.
LASER & PHOTONICS REVIEWS
(2022)
Article
Physics, Multidisciplinary
Guangzhou Geng, Ruhao Pan, Wei Zhu, Junjie Li
Summary: This research demonstrates an asymmetrical spin-dependent beam splitter based on a single-layer dielectric metasurface. The metasurface breaks the conjugated characteristic of phase gradient and exhibits strong and controllable optical response. This method allows for flexible manipulation of spin photons and has potential for versatile functionalities in a compact space.
Article
Nanoscience & Nanotechnology
Muzamil Shah, Muhammad Sajid
Summary: We investigate the photonic spin Hall effect (PSHE) in a magnetic topological ultra-thin film (MTF) in the terahertz regime, considering in-plane and transverse effects. Our findings demonstrate that both PSHE effects are quantized due to the quantization of the Landau levels (LLs) of the magneto-optical (MO) conductivity. The interaction between hybridization and Zeeman energy leads to topological and normal insulating phases, and the PSHE can be greatly enhanced in MTF.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2022)
Review
Physics, Applied
Xiaohui Ling, Zan Zhang, Shizhen Chen, Xinxing Zhou, Hailu Luo
Summary: Optical beam shifts, such as Goos-Hanchen shift and spin-Hall shift, are prevalent in basic optical processes and can be used to explore and characterize 2D atomic crystals. They have great potential for applications in precision metrology and sensing due to their sensitivity to material parameter changes.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Optics
Titao Xiao, Hua Yang, Qiang Yang, Dingyu Xu, Ruisi Wang, Shizhen Chen, Hailu Luo
Summary: The proposed scheme utilizes computing metasurfaces to achieve fast switching between bright-field images and edge images, introducing different phase retardances by regulating external voltages.
Article
Optics
Yunpeng Wu, Shuoqing Liu, Shizhen Chen, Hailu Luo, Shuangchun Wen
Summary: This paper investigates two models for describing the behavior of light in graphene and proposes a method to detect the small difference between these models using the photonic spin Hall effect and weak-value amplification. Experimental results show that the zero-thickness model provides a more accurate description for the interaction between light and monolayer or bilayer graphene, while the slab model should be used for more than two layers.
Article
Optics
Shanshan He, Ruisi Wang, Wenhao Xu, Zhaoming Luo, Hailu Luo
Summary: Optical analog computing operates on the electromagnetic field through the interaction of light and matter. This paper proposes a concise method to observe transparent particles and successfully achieves high-contrast optical images. The method provides the possibility to directly observe protein particles in complex biological tissues.
Article
Optics
Yichang Shou, Yan Wang, Lili Miao, Shizhen Chen, Hailu Luo
Summary: This study introduces the idea of cascaded operations into all-optical spatial analog computing, achieves all-optical second-order spatial differentiators by cascading operation units, and demonstrates image edge detection applications.
Article
Physics, Applied
Ruisi Wang, Shanshan He, Hailu Luo
Summary: The visualization of transparent phase objects is crucial in biological research, but it is challenging due to the weak scattering and absorption. In this study, a differential microscopy based on the photonic spin Hall effect is proposed, which can achieve high-contrast imaging of pure phase objects. The phase distribution can be reconstructed by biased imaging, providing potential for high-resolution reconstruction and quantitative analysis of phase images.
PHYSICAL REVIEW APPLIED
(2022)
Article
Physics, Applied
Ruisi Wang, Shanshan He, Shizhen Chen, Hailu Luo
Summary: In this study, a differential microscope based on the Brewster effect is proposed and demonstrated, which enables high-contrast imaging of transparent samples. By utilizing the spin-orbit interaction of light and local reflection, the incident light can be differentiated in two dimensions and the original phase distribution can be reconstructed, overcoming the limitations of traditional imaging.
APPLIED PHYSICS LETTERS
(2022)
Article
Optics
Xiaohui Ling, Zan Zhang, Zhiping Dai, Zhiteng Wang, Hailu Luo, Lei Zhou
Summary: The physical origin of the photonic spin-Hall effect (PSHE) at optical interfaces is explored through studying the scatterings of circularly polarized beams obliquely incident on a series of junctions. The PSHE is determined by the interplay between the spin-redirection Berry (SRB) phase and the Pancharatnam-Berry (PB) phase. Shrinking the interfacial region can change the PSHE from SRB-dominated to PB-dominated.
LASER & PHOTONICS REVIEWS
(2023)
Editorial Material
Physics, Multidisciplinary
Shiyao Fu, Hailu Luo, Carmelo Rosales-Guzman
FRONTIERS IN PHYSICS
(2023)
Letter
Optics
Yan Wang, Qiang Yang, Yichang Shou, Hailu Luo
Summary: Mathematically, any function can be expressed as the operation form of another function. In this study, the concept is applied to an optical system for generating structured light. By representing mathematical functions as optical field distributions and using optical analog computations, different structured light fields can be generated from input optical fields. The scheme takes advantage of the Pancharatnam-Berry phase for broadband performance. The work demonstrates a flexible method for generating broadband structured light, with potential applications in high-resolution microscopy and quantum computation.
Article
Optics
Kuiming Zeng, Shanshan He, Xianping Wang, Hailu Luo
Summary: A compact optical integration of dynamic phase and geometric phase is proposed to generate arbitrary vector vortex beams on a hybrid-order Poincare sphere. By applying two different technologies, dynamic and geometric phase elements are integrated into a single glass plate to simultaneously modulate the phase and polarization of light. The vector polarization is realized by the metasurface structure, while the vortex phase is generated by the spiral phase plate. Potential applications in future integrated optical devices are anticipated due to its high transmission efficiency and conversion efficiency.
Article
Optics
Qiuying Li, Hua Yang, Yan Wang, Yichang Shou, Shuoqing Liu, Hailu Luo
Summary: This study proposes an optical method for surface topography detection of low-contrast phase objects, which achieves spatial differential operation by constructing reflected light paths. The method is demonstrated to be universal and accurate, and applicable to both opaque and transparent pure phase objects.
Article
Optics
Wenshuai Zhang, Yongsheng Wang, Dingyu Xu, Hailu Luo
Summary: This study investigates the spin-orbit interaction of a vortex beam reflected on twisted few-layer hyperbolic metasurfaces. The spatial Imbert-Fedorov (IF) shift and photonic spin Hall effect (PSHE) shift are found to have symmetrical relationships with the twist angle and are influenced by the topological charge and the polarization state of the incident beam. These findings provide new insights for further investigations of twisted light and twisted metasurfaces.
Article
Optics
Wenshuai Zhang, Yongsheng Wang, Shizhen Chen, Shuangchun Wen, Hailu Luo
Summary: Motivated by the stacked two-dimensional materials with a twist angle, this study investigates the photonic spin Hall effect in twisted few-layer anisotropic two-dimensional atomic crystals. A generalized model for arbitrary layers of anisotropic two-dimensional atomic crystals is developed, and the photonic spin Hall effect of twisted few-layer black phosphorus without interlayer interaction is demonstrated and discussed. The results show that the twist between different layers leads to the in-plane spin Hall shift, which is highly sensitive to the twist angle. The in-plane spin Hall shifts are symmetric about the origin as a function of the twist angle, while the transverse spin Hall shifts are symmetric about the axis. The photonic spin Hall shifts also exhibit periodic changes with the thickness of the interlayer due to the optical Fabry-Perot resonance.
Article
Optics
Yongsheng Wang, Wenshuai Zhang, Shizhen Chen, Shuangchun Wen, Hailu Luo
Summary: In this study, a multiple weak-value model is proposed in quantum weak measurement to improve measurement accuracy by introducing modified preselection states, particularly for broad-spectrum light sources.
