Article
Nanoscience & Nanotechnology
Shuang Zheng, Zhenyu Zhao, Weifeng Zhang
Summary: This paper proposes a novel approach based on silicon photonics to achieve the functionality of generating and manipulating complex phase-structured light beams at the chip level. By designing subwavelength holographic surface gratings, broadband generation of Laguerre-Gaussian and linearly polarized modes is achieved. Furthermore, by assigning appropriate geometric phase profiles to the spiral phase distribution, off-chip vortex beam emission and focusing can be realized. Experimental results demonstrate that directed vortex beam emission can be achieved using a fabricated tilt subwavelength holographic fork grating. The proposed waveguide structures enrich the functionalities of dielectric meta-waveguide structures and have potential applications in optical communication, optical trapping, nonlinear interaction, and imaging.
Article
Optics
Rijian Chen, Yile Shi, Ning Gong, Yefeng Liu, Zhijun Ren
Summary: Based on the stationary phase principle, we have constructed a family of shaping nondiffracting structured caustic beams with the desired morphology. The key optical structure and propagation characteristics of these beams have been investigated through theoretical derivation, numerical simulation, and experimental verification. The method introduced in this study shows high efficiency in light-energy utilization and convenient application in scientific experiments.
CHINESE OPTICS LETTERS
(2023)
Article
Optics
Xiliang Zhang, Yanwen Hu, Xin Zhang, Zhen Li, Zhenqiang Chen, Shenhe Fu
Summary: A holography technique for arbitrary light sculpting at the deep-subwavelength scale is demonstrated, using high-spatial-frequency waves as carriers to encode structured light. Various well-defined light modes and patterns on the nanometric scale are generated, offering potential applications in optical super-resolution imaging, nanoparticle manipulation, and precise measurements.
LASER & PHOTONICS REVIEWS
(2023)
Article
Nanoscience & Nanotechnology
Xinlei Zhu, Jiayi Yu, Yahong Chen, Fei Wang, Yangjian Cai
Summary: This article presents a simple and flexible technique for nearly real-time generation of stochastic structured light beams (SSLBs) with controllable beam parameters. The approach allows for tailoring of beam amplitude, phase, polarization, and correlation functions simultaneously. The method offers new opportunities for manipulating the polarization state of structured light beams and has important applications in optical communications and imaging.
Article
Optics
Jiaxin Li, Xueyu Chen, Ziang Lin, Zhiqiang Xie, Yanliang He, Ying Li, Dianyuan Fan, Shuqing Chen
Summary: A polarization-independent and broadband hollow Gaussian beam (HGB) generation method is proposed and demonstrated using cascaded dielectric metasurface q-plates. This method is applicable to visible light and beneficial for fundamental research on HGBs.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Physics, Multidisciplinary
Mansi Baliyan, Allarakha Shikder, Naveen K. Nishchal
Summary: In this study, a simple experimental setup using a single phase-only SLM has been proposed to achieve complex light modulation. By encoding two cascaded phase value distributions onto the SLM, both amplitude and phase modulation of light beam can be achieved, enabling wavefront shaping. The feasibility of the proposed technique has been verified, and commonly known singular beams such as Laguerre-Gaussian and Bessel-Gaussian modes have been successfully generated.
Article
Engineering, Electrical & Electronic
Hao Tang, Shuai Ding, Zhaojun Zhu, Xiong Wang, Zhengping Zhang
Summary: A method to generate multiple nondiffracting beams using a transmission metasurface is proposed in this letter. The unit cell is composed of two layers of circular resonant patches and a middle medium layer. By rotating the unit cell at different angles, a 360-degree transmission phase shift is obtained. The method of generating multiple nondiffracting beams on the metasurface is achieved through a multibeam shared-aperture method. Multiple subarrays are utilized to launch nondiffracting beams propagating in different directions in a shared-aperture manner. Each subarray is independent and complementary, allowing for more flexible control of the deflection of multiple nondiffracting beams. Three nondiffracting beams are generated using the same transmission metasurface according to the proposed method. Fabrication and measurement of the metasurface validate the design.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Jie Zhu, Kaicheng Zhu, Nan Ding, Taofen Wang
Summary: A new non-diffracting beam family is introduced as a solution to the scalar Helmholtz equation in Cartesian coordinates, characterized by Tricomi functions and four parameters, allowing for the generation of various types of Bessel beams. Modulation of the angular spectra in frequency space enables controlled adjustments to both intensity and phase distributions of the beam, resulting in changes to the transverse intensity pattern.
RESULTS IN PHYSICS
(2021)
Article
Optics
Jie Xu, Changjun Min, Yuquan Zhang, Jielei Ni, Gengwei Cao, Qianyi Wei, Jianjun Yang, Xiaocong Yuan
Summary: In this study, a wide-field single-probe structured light microscopy (SPSLM) is proposed and built to image the ultrafast three-dimensional topography evolution induced by femtosecond (fs) lasers. The SPSLM achieves high-resolution imaging in both spatial and temporal domains by utilizing a single imaging frame and a structured probe pulse. The technology is of great significance for studying ultrafast dynamics in fields such as fs laser ablation and material science.
PHOTONICS RESEARCH
(2022)
Article
Optics
Job Mendoza-Hernandez
Summary: The research shows that structured light beams can be customized using a differential operator in Fourier space. Custom beams generated on the seed-PLG preserve their distribution longer than those obtained with the seed-Bessel during propagation, when both beams have similar initial conditions.
Article
Optics
Pavel Gotovski, Paulius Slevas, Sergej Orlov, Orestas Ulcinas, Antanas Urbas
Summary: In this study, an optical element based on the space-domain Pancharatnam-Berry phase is proposed to generate a high-power optical needle with a smooth and constant on-axis intensity profile. The implementation involves modifying bulk transparent glass material to form nanogratings, ensuring stability even under imperfect conditions. Numerical and experimental investigations are conducted to analyze the effects of misalignments in the optical schema on the generation of the optical needle.
Article
Optics
Stefania A. Glukhova, Maxim A. Yurkin
Summary: This article proposes a general method for classifying Bessel beams and discusses the relationships and orthogonality between different beam types, providing a comprehensive reference for the application of Bessel beams. Furthermore, the formalism of the Mueller scattering matrices is extended to include Bessel beams with vorticity, and these beams are implemented in the ADDA code for efficient simulation of scattering by particles with arbitrary shape and internal structure.
Article
Optics
Wenye Zhong, Wei-Ping Zhong, Milivoj Belic, Zhengping Yang, Guofa Cai
Summary: This paper investigates the propagation characteristics of three-dimensional spatiotemporal nondiffracting parabolic cylinder beams in free space, presenting analytically and numerically the intensity distribution that can be controlled by adjusting the values of the three mode numbers.
Article
Optics
Yue Chai, Nacera Bouldja, Nicolas Marsal, Delphine Wolfersberger
Summary: This numerical study investigates photo-induced waveguides in a photorefractive medium using a single Bessel beam. The research shows that under self-focusing nonlinearity, complex waveguiding structures can be created with multiple input/output channels, with key parameters such as beam truncation, medium nonlinearity, and light intensity.
Article
Optics
Svetlana N. Khonina, Andrey V. Ustinov, Alexey P. Porfirev
Summary: This study investigates the sharp focusing of a non-uniform elliptically polarized structured light field. The intensity distribution was found to exhibit rotational symmetry in certain cases, with radially symmetric energy flow and negative direction near the optical axis. In another case, despite the complex input field, the focused field at each point had local linear polarization. These findings have implications for laser manipulation and laser matter interaction.
Article
Optics
Yongyao Li, Jiantao Lu, Shenhe Fu, Ady Arie
Summary: The research explores the application of adiabatic geometric phase (AGP) in nonlinear frequency conversion, developing canonical Hamilton equations and geometric representations for four-wave mixing (FWM) processes. The study systematically investigates AGPs of idler and signal waves in different pump wave scenarios, demonstrating universal methods for AGP calculations applicable to shaping or encoding ultrafast light pulses through FWM processes.
Article
Optics
Yanwen Hu, Guangcui Mo, Zixian Ma, Shenhe Fu, Siqi Zhu, Hao Yin, Zhen Li, Zhenqiang Chen
Summary: The study reveals that a diffractive structure with cylindrical symmetry is transparent for the vector vortex state of light with arbitrary topology, and demonstrates this phenomenon experimentally under the Fresnel diffraction condition. This has implications for control and manipulation of vector vortex light beams in diffractive optics, with potential applications.
Article
Nanoscience & Nanotechnology
Mingsi Zhang, Haoran Ren, Xu Ouyang, Meiling Jiang, Yudong Lu, Yanwen Hu, Shenhe Fu, Zhen Li, Zhenqiang Chen, Bai-Ou Guan, Yaoyu Cao, Xiangping Li
Summary: The strong coupling between light's spin and orbital angular momentum under nonparaxial conditions is important for both fundamental sciences and practical applications. By using a nanointerferometric scheme, it is possible to map these light attributes with subwavelength resolution, which can be applied to nanoscale inhomogeneous media. This coupling is crucial for understanding the behavior of light propagation in nanostructures and its potential applications.
Article
Optics
Feiyan Zhao, Jiantao Lu, Hexiang He, Yangui Zhou, Shenhe Fu, Yongyao Li
Summary: Two rotation schemes, full-wedge rotation and half-wedge rotation, of the QPM parameters in the process of fully nonlinear three-wave mixing were studied. These two schemes can effectively suppress uncertainty in creating the geometric phase in the nonlinear frequency conversion process.
Article
Optics
Guohua Liu, Shenhe Fu, Xiliang Zhang, Hao Yin, Zhen Li, Zhenqiang Chen
Summary: The paper presents a novel theoretical platform for geometric control of vector vortex states in optical coupling systems, showing how tailored phase mismatch profiles and suitable coupling support state conversion between higher-order complex light fields. This control allows for robust state conversion between two arbitrary vector vortex light fields and has potential applications in classical and quantum optics.
Article
Optics
Jiongchao Zeng, Yanwen Hu, Xin Zhang, Shenhe Fu, Hao Yin, Zhen Li, Zhenqiang Chen
Summary: We demonstrate the localization-to-delocalization transition of light in frequency-tuned photonic moire lattices, achieved by realizing composite photonic lattices with two twisted sublattices. The observed transition between localization and delocalization of light field is moire angle-independent. This angle-insensitive property can be extended to higher-order vortex light field in photonic lattices, allowing prediction of both localization and delocalization.
Article
Engineering, Electrical & Electronic
Juan Ding, Yong He, Shenhe Fu, Xiangsheng Xie, Haowen Liang, Jianying Zhou
Summary: Illumination is crucial for perceiving the colorful world by human vision, and display technology has rapidly developed. The proposed novel illumination scheme ensures that displaying images are visible only in specific spatial regions.
JOURNAL OF THE SOCIETY FOR INFORMATION DISPLAY
(2022)
Article
Optics
Haolin Lin, Shenhe Fu, Hao Yin, Zhen Li, Zhenqiang Chen
Summary: In this study, a novel optical intrinsic orbit-orbit interaction, known as vortex-antivortex interaction, is theoretically and experimentally demonstrated. Strong coupling leads to intuitive mutual attraction between two reciprocal vortices, while weak coupling results in a counterintuitive repulsive phenomenon. The vortex-antivortex interaction enables the predictions and observations of the orbital angular momentum Hall effect and stable propagation of appropriately structured vortex arrays.
LASER & PHOTONICS REVIEWS
(2022)
Article
Optics
Zixian Ma, Xin Zhang, Yanwen Hu, Hao Yin, Zhen Li, Zhenqiang Chen, Shenhe Fu
Summary: Diffraction-limit focusing can be achieved through the use of spirally structured slit motifs. This technique is more accessible in terms of fabrication cost and can generate high-resolution focusing beams.
Article
Optics
Junjie Chen, Yanwen Hu, Hao Yin, Zhen LI, Zhenqiang Chen, Shenhe Fu
Summary: This study demonstrates that high-spatial-frequency waves can propagate freely to the far-field regions, contrary to the conventional belief. A technique based on abrupt truncation of incident plane waves is used to generate these waves, which can be observed through interference fringes in the far field. The findings of this study introduce the concept of high-spatial-frequency propagating waves and have the potential to stimulate further research and applications.
Article
Materials Science, Multidisciplinary
Xin Zhang, Yanwen Hu, Xiliang Zhang, Siqi Zhu, Hao Yin, Zhen Li, Zhenqiang Chen, Shenhe Fu
Summary: This article introduces a new working mechanism for flat lens design, called a global phase-modulation mechanism, and demonstrates the potential applications of multifunctional flat lenses.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Optics
Junhui Jia, Haolin Lin, Yixuan Liao, Zhen LI, Zhenqiang Chen, Shenhe Fu
Summary: We report a class of nondiffracting solutions to the paraxial wave equation perturbed by a harmonic potential. These solutions allow light to accelerate along an arbitrary trajectory centered on an elliptic or circular orbit in a (2+1)D configuration, while maintaining their phase and polarization structures during propagation. We name these oscillating wave packets as pendulum-type beams.
Article
Optics
Yanwen Hu, Shiwang Wang, Junhui Jia, Shenhe Fu, Hao Yin, Zhen Li, Zhenqiang Chen
Summary: The study introduces a new superoscillatory wave form that can achieve significant feature sizes down to deep subwavelength, while completely eliminating side lobes in a particular dimension. This wave form is generated based on a pair of moonlike sharp-edge apertures, producing Bessel-like forms that allow long-distance propagation of subwavelength structures. This result not only facilitates research on optical superoscillation but also fundamentally eliminates the compromise between feature size and field of view.
ADVANCED PHOTONICS
(2021)
Article
Optics
Yongyao Li, Ofir Yesharim, Inbar Hurvitz, Aviv Karnieli, Shenhe Fu, Gil Porat, Ady Arie
