Article
Physics, Multidisciplinary
Junlang Feng, Wenqiong Chen, Rui Liu, Zhonglei Mei
Summary: In this paper, a novel multiplexing imaging method is reported, which achieves totally independent imaging channels by controlling the phase and polarization of light. A dielectric metasurface consisting of subwavelength nanobricks is designed and simulated, demonstrating the projection of grayscale image and the reconstruction of holographic image. This method has potential applications in information encryption, multiplexing, and anti-counterfeiting.
Article
Optics
Hyosim Yang, Dai-Sik Kim, Hyeong Seok Yun, Sunghwan Kim, Dukhyung Lee
Summary: In this study, a non-etching patterning method for vanadium dioxide (VO2) is demonstrated using photolithography and thermal oxidation. The resulting VO2 slit array metasurfaces show constant transparency in the terahertz range, regardless of the phase transition of the VO2 lines. In addition, the optical path difference between the slits and the VO2 lines can be controlled in the near-infrared range, allowing for selective switching of diffraction.
LASER & PHOTONICS REVIEWS
(2022)
Article
Physics, Applied
Rajan Agrahari, Prashant Kumar Rajbhar, Manpuran Mahto, Pradip Kumar Jain
Summary: A wideband reflective type metasurface capable of both cross and circular polarization conversions at different frequencies is proposed. The meta-atom of the metasurface consists of six L-shaped metallic patches, which achieved polarization conversion ratio (PCR) > 0.9 over the 10.3-15.26 GHz band and axial ratio (AR) < 3 dB over the 8.97-9.75 GHz and 17.51-23.93 GHz bands, achieving more than 30% fractional bandwidth for both functions. The physical mechanism of linear and circular polarization conversion is analyzed through the spatial profile of electric and magnetic fields. The experimental results of the fabricated metasurface prototype with 25 x 25 meta-atoms are in reasonable agreement with the simulated results. The integration of the designed metasurface with antennas enables its extensive application in diverse microwave polarization manipulation devices.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Optics
Naixuan Zhao, Zile Li, Guodong Zhu, Jiaxin Li, Liangui Deng, Qi Dai, Weiguo Zhang, Zhixue He, Guoxing Zheng
Summary: This study proposes an ultracompact metasurface design that utilizes a single-cell strategy to establish three independent information channels for simultaneous watermarked structural-color nanoprinting and holographic imaging. The metasurface combines dual-channel spectrum manipulation and single-channel phase manipulation by introducing orientation degeneracy, enabling the generation of a structural-color nanoprinting image with polarization-dependent watermarks and a holographic image in different decoded environments.
Article
Engineering, Electrical & Electronic
Heng Yang, Shi Cong Wang, Peng Li, Yuan He, Yun Jing Zhang
Summary: In this study, a reflective polarization conversion metasurface (PCM) with symmetrical L-shaped patches is proposed, enabling switch between linear-to-linear (LTL) cross-polarization and linear-to-circular (LTC) polarization modes using PIN diodes. The PCM demonstrates ultrawide bandwidth for both LTL and LTC polarization conversion through multimode activation. A microstrip line-based dc biasing network composed of radial stubs is introduced to isolate RF currents, overcoming issues caused by RF-lumped choke inductors in the ultrawide bandwidth. A prototype with 15 x 15 units is fabricated and shows successful LTC and LTL polarization conversion within specific frequency ranges.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Engineering, Electrical & Electronic
Taoming Lu, Jiong Wu, Zhaoyang Shen, Youcheng Wang, Houyuan Cheng, Yujun Li, Yuejie Yang, Helin Yang
Summary: The metasurface is a subwavelength structure-based ultra-thin device with strong light field control ability. In this article, a novel ultrathin metasurface is proposed, which can function as a beam splitter and controls the polarization of electromagnetic waves. Broadband operation and phase control are achieved based on geometric phase theory.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Physics, Applied
Jiayu Chen, Weihan Li, Yunfeng Zhang, Wenyu Ma, Wenxuan Tang, Tiejun Cui
Summary: Reflection- and transmission-type metasurfaces have great potentials in wireless communications. In this study, we propose an absorption-transmission-type multifunctional coding metasurface composed of an absorptive layer and a transmissive layer. This coding metasurface can independently perform three different functions for incident waves at different frequencies and polarizations: wave absorption, vortex-wave generation, and beam deflection. Numerical and experimental results demonstrate the excellent performance of low-frequency absorptions and high-frequency dual-polarization transmissions. This work provides a method for developing multifunctional and reconfigurable components for wireless communications in the future.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Yana V. Izdebskaya, Ziwei Yang, Vladlen G. Shvedov, Dragomir N. Neshev, Ilya V. Shadrivov
Summary: In this work, a multifunctional dynamic tuning method for dielectric metasurfaces containing liquid crystals is introduced and demonstrated. By rotating an external magnetic field in 3D, the electric and magnetic resonances of the metasurfaces can be tuned, allowing for independent control and multifunctional operation. This approach eliminates the need for pre-alignment of liquid crystals and is not limited by a finite set of molecular orientations. The results open up new possibilities for dynamically reconfigurable devices and the observation of novel physical effects.
Article
Chemistry, Multidisciplinary
Xue Zhang, Xin Li, Hongqiang Zhou, Qunshuo Wei, Guangzhou Geng, Junjie Li, Xiaowei Li, Yongtian Wang, Lingling Huang
Summary: This study proposes and demonstrates a 3D multifocal display method based on SMS. By optimizing the phase configuration using Fourier expansion, SMS can reorganize planar images to form 3D images with correct depth cues. Experimental results show its effectiveness in stereoscopic display.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
Jiu-sheng Li, Min Zhong
Summary: In this letter, a multifunctional terahertz metasurface for Airy beams is proposed, which can achieve various functions under different polarized waves. The structure can generate Airy beams and autofocusing Airy beams under linearly polarized waves incidence, as well as focusing, multi-vortex beams, and focusing vortex beams under circularly polarized wave incidence. The presented structure has potential applications in biomedicine, imaging, holography, and terahertz multifunctional devices.
IEEE PHOTONICS TECHNOLOGY LETTERS
(2023)
Review
Biochemistry & Molecular Biology
Qingluo Wang, Guoyu Xia, Jianmin Li, Longlong Yuan, Shujie Yu, Dingyang Li, Nan Yang, Zhongxiong Fan, Jinyao Li
Summary: Tumors are a major public health issue, and the application of near-infrared second region (NIR-II) optical imaging and nanomaterials in tumor diagnosis and treatment has garnered significant attention.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Engineering, Multidisciplinary
Ping Wang, Yong Zhang, Yu Wang, Hong-cheng Zhou, Zhong-ming Yan
Summary: In this paper, a multifunctional polarization converter (MFPC) based on the multilayer reconfigurable metasurface is proposed, which can assist the source antenna to transmit and receive multiple polarization signals. The MFPC consists of a grating and four layers of metasurfaces incorporated with PIN diodes, providing functions such as polarization conversions and filtering. The proposed MFPC has potential applications in improving wireless communication capacity and reliability.
DEFENCE TECHNOLOGY
(2023)
Article
Multidisciplinary Sciences
Dongjin Kim, Baekgyeom Kim, Bongsu Shin, Dongwook Shin, Chang-Kun Lee, Jae-Seung Chung, Juwon Seo, Yun-Tae Kim, Geeyoung Sung, Wontaek Seo, Sunil Kim, Sunghoon Hong, Sungwoo Hwang, Seungyong Han, Daeshik Kang, Hong-Seok Lee, Je-Sung Koh
Summary: This study demonstrates augmented reality glasses and haptic gloves enabled by artificial muscle actuators, which allow for image depth control and immersive tactile response. These lightweight and high-power actuators solve engineering problems in compact wearable devices.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Jing Li, Hongjie Fan, Han Ye, Tiesheng Wu, Yuhang Sun, Xueyu Wang, Yumin Liu
Summary: This paper proposes a stretchable metasurface with both multifunctionality and tunability, which has great potential for applications in optical devices. By changing the period Px of the metasurface, the functions can be switched and the splitting angle can be adjusted.
Article
Chemistry, Multidisciplinary
Ruonan Ji, Chuan Jin, Kun Song, Shao-Wei Wang, Xiaopeng Zhao
Summary: A Janus metasurface was designed by breaking the structural symmetry based on the polarization selection property of subwavelength grating, allowing for efficient polarization control. Furthermore, the metasurface can be cascaded for more flexible functions, providing convenience and flexibility in designing multifunctional and miniaturized optical components.
Article
Optics
Gang Yao, Yuhua Li, Rui-Pin Chen
Summary: Using the two-dimensional nonlinear Schrodinger equation, this study explores the collapse dynamics of vortex beams in a Kerr medium with refractive index modulation and parity-time symmetric lattices. The research finds that the collapse characteristics of the beam are closely related to the modulation factors and lattice types, offering a new approach to control the collapse of vortex beams.
Article
Optics
Wensong Dan, Xiang Zang, Fei Wang, Yimin Zhou, Yiqing Xu, Ruipin Chen, Guoquan Zhou
Summary: This paper derives an analytical expression for a single Airyprime beam propagating in free space. The single Airyprime beam is a coherent superposition of the Airyprime and Airy-related modes, resulting in an interference enhancement effect. The maximum light intensity and propagation characteristics are influenced by the decay factor.
Article
Optics
Yuhua Li, Shao Hao Wang, Wai Lok Ho, Xiaotian Zhu, Xiang Wang, Roy R. Davidson, Brent E. Little, Rui-Pin Chen, Sai Tak Chu
Summary: This article reports the first observation of second-harmonic generation in a high-index doped silica micro-ring resonator and explores its generation mechanism and influencing factors. This work offers a new approach to achieve a visible-light integrated optical platform.
Article
Multidisciplinary Sciences
Xiao-Bo Hu, Bo Zhao, Rui-Pin Chen, Carmelo Rosales-Guzman
Summary: Complex vector modes are optical states that are nonseparable in their spatial and polarization degrees of freedom, and exhibit unexpected propagation behaviors. This study introduces a novel class of vector modes with the ability to experience abrupt autofocusing behavior, and demonstrates their properties, including intermodal phase rotation, through experimental generation of circular Airy Gaussian vortex (CAGV) beams. The fascinating properties of these modes are expected to drive the development of new applications associated with autofocusing behavior and polarization distribution.
SCIENTIFIC REPORTS
(2022)
Article
Optics
Shu-Dan Wu, Khian-Hooi Chew, Rui-Pin Chen
Summary: We investigated the effect of a new twisting phase on the polarization dynamics and spin-orbital angular momentum conversion of tightly focused scalar and vector beams. The existence of twisting phases leads to conversion between linear and circular polarizations in both types of beams. This conversion further results in an optical spin-orbital angular momentum transformation in the longitudinal component.
Article
Optics
Caixia Liu, Yuhua LI, Fengmin Wu, Rui-Pin Chen
Summary: This paper investigates the evolution of the state of polarization in a twisted vector optical field with an astigmatic phase in a strongly nonlocal nonlinear medium. The astigmatic phase affects the propagation dynamics of the twisted scalar optical field and twisted vector optical field, resulting in periodical evolutions of stretch and shrink and reciprocal transformations between initial circle shape and threadiness distribution. The rotated motion of the twisted scalar optical field and twisted vector optical field along the propagation axis is observed when the beams are anisotropic. The reciprocal conversions between linear and circular polarizations occur in the twisted vector optical field during propagation, which are strongly dependent on the initial powers, twisting strength coefficients, and initial beam reshapes. The numerical results confirm the analytical predictions by the moment method and the underlying physics for the polarization evolution of the twisted vector optical field in the strongly nonlocal nonlinear medium are discussed in detail.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION
(2023)
Article
Optics
Yifan Shao, Shuhan Guo, Rui Chen, Yongdi Dang, Yi Zhou, Yubo Wang, Junjie Zhan, Jiaqi Yu, Bing-Feng Ju, Yungui Ma
Summary: The in-built color filters in conventional image sensors cause significant out-of-band energy loss, leading to degradation in signal-to-noise ratio and dynamic range. This study presents a pixelated spectral router using a 2D Si3N4 Mie-type metagrating, which efficiently separates near-infrared and visible light to different pixels. Compared to traditional filter designs, this router achieves approximately 42% and 30% signal enhancement for the near-infrared and visible bands, respectively.
LASER & PHOTONICS REVIEWS
(2023)
Article
Optics
Yingqi Huang, Baoyin Liu, Caixia Liu, Xiaobo Hu, Yan Wu, Khian-hooi Chew, Rui-pin Chen
Summary: This study demonstrates the influence of caustic and twisting phases on the polarization states of a vector beam, providing a new approach to manipulate polarization conversion.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION
(2023)
Article
Optics
Yi Zhou, Junjie Zhan, Ziyang Xu, Yifan Shao, Yubo Wang, Yongdi Dang, Sen Zhang, Yungui Ma
Summary: This paper experimentally demonstrates an analog spatiotemporal differentiator in microwaves based on an asymmetrical metasurface. By tailoring the unidirectional excitation of spoof surface plasmon polaritons, the structure achieves the spatiotemporal transfer function required by an ideal first-order differentiator in both spatial and temporal domains. The experimental results verify the spatial edge detection and temporal differentiation functions of the device, and estimate the resolution limits of the spatial and temporal edge detection. Moreover, it is found that the pulse input after passing the spatiotemporal differentiator can carry a transverse orbital angular momentum (OAM) with a fractal topology charge.
LASER & PHOTONICS REVIEWS
(2023)
Article
Optics
Yimin Zhou, Xiang Zang, Wensong Dan, Fei Wang, Ruipin Chen, Guoquan Zhou
Summary: For the first time, a four-fold centrosymmetric Airyprime beams array is designed and its analytical expression for free space propagation is derived. The autofocusing property of the Airyprime beams array is demonstrated, and the effects of various parameters on its autofocusing ability and focus position are investigated. The results show that increasing the transverse displacement parameter or reducing the exponential decay factor improves the autofocusing ability, while decreasing the scaling factor enhances the ability for non-centered positions. The focus position can be controlled by adjusting the transverse displacement parameter or the scaling factor.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Optics
Jie Gao, Guochen Wang, Yubin Chen, Xin Wang, Yuhua Li, Khian-hooi Chew, Rui-pin Chen
Summary: This study proposes a novel Mueller transform matrix network (MTM-Net) for restoring images degraded by scattering media, particularly in turbid water environments. The network considers the physical dehazing model using the Mueller matrix method, significantly improving the recovery performance. It is trained with a loss function that combines content and pixel losses to facilitate detail recovery, and is accelerated with the inverse residuals and channel attention structure without sacrificing image recovery quality. A series of experiments and tests confirm its superior performance compared to other methods, providing deeper understanding of underwater polarimetric dehazing imaging and expanding the functionality of polarimetric dehazing method.
Article
Materials Science, Multidisciplinary
Yi Zhou, Junjie Zhan, Yifan Shao, Yubo Wang, Yongdi Dang, Sen Zhang, Hugo E. E. Hernandez-Figueroa, Yungui Ma
Summary: This study demonstrates a reconfigurable spatiotemporal optical signal processor using the phase-change material vanadium dioxide (VO2) to expand the processing bandwidth and enrich the operation functions. By controlling the operation temperature, a meta-device is designed that can switch between a first-order differentiator and a reflector in the spatiotemporal domain. The approach enables high-accuracy spatial and temporal signal processing, and holds great potential in applications such as remote sensing and fast imaging processing.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Physics, Applied
Yuxuan Li, Yongdi Dang, Sen Zhang, Xinran Li, Yi Jin, Philippe Ben-Abdallah, Jianbin Xu, Yungui Ma
Summary: Developing thermal analogues of a field-effect transistor could lead to low-power communication technology using heat instead of electricity. Experimental demonstration of a thermal transistor effect using a noncontact system shows that a tiny change in temperature can significantly modify heat flux.
PHYSICAL REVIEW APPLIED
(2023)
Article
Optics
Yan Wu, Xiaobo Hu, Yuhua Li, Ruipin Chen
Summary: Using the Richards-Wolf diffraction integral, the longitudinal energy evolution of fractional order vector vortex (FOVV) beams on the focal plane was studied. The existence of backflow energy was revealed when the binary topological charges satisfied specific conditions. Component circularly polarized vortex beams played significant roles in generating reverse energy flux. The longitudinal energy on the focal plane exhibited axial symmetry for FOVV beams with integer sums and differences of binary topological charges, but was disrupted when the sums or differences were not integers.
Article
Engineering, Electrical & Electronic
Guochen Wang, Jie Gao, Yubin Chen, Xin Wang, Jiangtao Li, Khian-Hooi Chew, Rui-Pin Chen
Summary: This paper proposes a polarization-enhanced underwater multiple material target detection method to address the challenges of complex scattering, low visibility, and target clutter. By utilizing the similarity principle of locally backscattered polarization features to suppress the influence of backscattered light, our method combines the polarization gradient and edge detection techniques for optimized detection process, resulting in superior target detection and feature extraction. Experimental results demonstrate that our method significantly enhances the detection performance in multiple material targets, especially in high turbid underwater scattering environments.
IEEE PHOTONICS JOURNAL
(2023)
