Article
Optics
Xinjian Lu, Yinghui Guo, Mingbo Pu, Yaxin Zhang, Zhu Li, Xiong Li, Xiaoliang Ma, Xiangang Luo
Summary: In this article, a single-layer broadband achromatic metasurface was proposed to achieve sub-diffraction focusing in the visible range. It is capable of generating sub-diffraction focal spots under left-handed circularly polarized incident light with arbitrary wavelength at the same focal plane, showing promising potentials in various applications.
Article
Chemistry, Multidisciplinary
Ayato Iba, Makoto Ikeda, Valynn Katrine Mag-usara, Verdad C. Agulto, Makoto Nakajima
Summary: This paper presents a metamaterial-based super-oscillatory lens capable of generating sub-wavelength focal points at sub-THz frequencies, which is highly effective for industrial inspection applications utilizing terahertz waves.
APPLIED SCIENCES-BASEL
(2022)
Article
Nanoscience & Nanotechnology
Xuemei Dai, Fengliang Dong, Kun Zhang, Dingpeng Liao, Sheng Li, Zhengguo Shang, Yi Zhou, Gaofeng Liang, Zhihai Zhang, Zhongquan Wen, Gang Chen, Luru Dai, Weiguo Chu
Summary: In this paper, a holographic approach for achieving multiwavelength achromatic subwavelength super-resolution focusing is proposed, and a high-numerical-aperture achromatic super-resolution metalens is demonstrated at five different wavelengths. This method shows potential value in super-resolution related applications.
Article
Optics
Zhu Li, Changtao Wang, Yanqin Wang, Xinjian Lu, Yinghui Guo, Xiong Li, Xiaoliang Ma, Mingbo Pu, Xiangang Luo
Summary: This paper presents a design of a super-oscillatory metasurface doublet capable of achieving sub-diffraction focusing at high incident angles in the far field, with high efficiency and supporting numerical results. This technology may have potential applications in label-free super-resolution microscopy and optical precise fabrication.
Article
Physics, Applied
Shilin Luo, Fei Zhang, Xinjian Lu, Ting Xie, Mingbo Pu, Yinghui Guo, Yanqin Wang, Xiangang Luo
Summary: This paper designs a wide field-of-view metalens with a numerical aperture of 0.24, providing diffraction-limited field of view over 40 degrees at three discrete wavelengths. The metalens involves only a single layer of metasurface to correct aberration, simplifying the architecture compared with cascaded metalenses and conventional optical systems. Simulated results show great achromatic and diffraction-limited focusing performance, promising applications in various fields.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Naitao Song, Nianxi Xu, Dongzhi Shan, Yuanhang Zhao, Jinsong Gao, Yang Tang, Qiao Sun, Xin Chen, Yansong Wang, Xiaoguo Feng
Summary: The study analyzed the chromatic dispersion properties of metasurfaces and presented a method for correcting chromatic aberrations, demonstrating two broadband achromatic metasurfaces in the LWIR. This work represents a substantial advance in the field and brings it a step closer to practical applications.
Article
Multidisciplinary Sciences
Corey A. Richards, Christian R. Ocier, Dajie Xie, Haibo Gao, Taylor Robertson, Lynford L. Goddard, Rasmus E. Christiansen, David G. Cahill, Paul V. Braun
Summary: In this study, the authors used subsurface 3D printing to fabricate compact and high-performance achromatic imaging micro-optics. These micro-optics, which integrate refractive and diffractive elements, demonstrate high focusing efficiencies, high numerical apertures, and low chromatic focusing errors, offering a promising pathway towards achromatic micro-optical systems.
NATURE COMMUNICATIONS
(2023)
Article
Engineering, Electrical & Electronic
Jin Chen, Hongchen Chu, Yao Zhang, Yun Lai, Mingji Chen, Daining Fang
Summary: A new gradient refractive index (GRIN) lens design based on a modified refractive index (RI) profile of classical Luneburg lens was proposed, achieving highly efficient achromatic subdiffraction focusing and directive far-field radiation. The experimental results of the 3-D printed sample were consistent with theoretical predictions and numerical simulations.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Optics
Haitang Yang, Esther Y. H. Lin, Kiriakos N. Kutulakos, George V. Eleftheriades
Summary: Super-oscillatory imaging is a technique that can go beyond the diffraction limit. This study provides a comprehensive theoretical analysis and experimental validation of the integration of super-oscillatory imaging into existing microscopes and telescopes, as well as the operational limits of the approach.
Article
Optics
Jin Chen, Hongchen Chu, Yun Lai, Huanyang Chen, Weili Song, Mingji Chen, Daining Fang
Summary: In this paper, a semi-circular gradient index lens (sGRIN) with a modified refractive index profile is proposed, achieving highly efficient achromatic subdiffraction focusing and broadband diffraction-limited far-field radiation.
PHOTONICS RESEARCH
(2021)
Article
Materials Science, Multidisciplinary
Lv-Rong Zhao, Xiao-Qiang Jiang, Cheng-Xi Li, Shao-Xiang Gong, Wei-Xing Yu
Summary: The recently developed achromatic metalenses have the potential to replace bulky conventional lenses, but current broadband achromatic metalenses (BAMs) in the long-wavelength infrared (LWIR) range have insufficient numerical aperture (NA) for microscopy or high-resolution imaging. To address this, a BAM with high NA for sub-diffraction focusing in LWIR waves is proposed. The proposed high-NA BAM shows well-corrected chromatic aberration, with a maximum deviation of only 3.95%, and has the potential for broadband applications in high-resolution imaging and microscopy.
RESULTS IN PHYSICS
(2023)
Article
Optics
Bhavesh Pant, Hemant Kumar Meena, Brijesh Kumar Singh
Summary: We introduce a method that utilizes a phase mask to generate a super-oscillatory focal spot of a tightly focused radially polarized beam. By applying vector diffraction theory, we demonstrate a super-oscillatory focal spot that surpasses both the diffraction limit and the super-oscillation criterion in terms of size. The proposed mask functions as a polarization filter that enhances the longitudinal component and eliminates the transverse component of radial polarization at the focal point, allowing for the creation of a pure longitudinal super-oscillatory focal spot.
Article
Multidisciplinary Sciences
Zhaoyi Li, Peng Lin, Yao-Wei Huang, Joon-Suh Park, Wei Ting Chen, Zhujun Shi, Cheng-Wei Qiu, Ji-Xin Cheng, Federico Capasso
Summary: The study demonstrated the design of millimeter-scale diameter, high-NA, submicron-thin metasurface lenses and their application in a virtual reality system.
Article
Physics, Applied
Song Zhang, Pengcheng Huo, Yilin Wang, Moxin Li, Cheng Zhang, Ting Xu
Summary: The focusing performance of optical beams is crucial for various applications. A metasurface composed of TiO2 nanopillars is used to generate an auto-focusing Airy beam without chromatism. This study paves the way for efficient achromatic auto-focusing Airy beam generation based on flat optical components.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Nanoscience & Nanotechnology
Qingqing Cheng, Juncheng Wang, Ling Ma, Zhixiong Shen, Jing Zhang, Xiaoying Zheng, Tao Chen, Ye Yu, Dong Yu, Qiong He, Wei Hu, Tao Li, Songlin Zhuang, Lei Zhou
Summary: By designing and fabricating an achromatic Airy-beam metalens, achromatic Airy beams with autofocusing and self-healing properties are successfully demonstrated, with a larger depth of focus. This paves the way for flat photonic devices for noninvasive biomedical imaging and light-sheet microscopy applications, with a numerical demonstration of a device protocol provided.
Article
Optics
Sujit Kumar Sahoo, Dongliang Tang, Cuong Dang
Article
Optics
Dongliang Tang, Sujit Kumar Sahoo, Vinh Tran, Cuong Dang
Article
Physics, Applied
Dongliang Tang, Jia Liu, Long Chen, Jianjun Liu, Xiaohu Zhang
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2020)
Article
Optics
Dongliang Tang, Long Chen, Jia Liu, Xiaohu Zhang
Article
Physics, Applied
Xiaohu Zhang, Dongliang Tang, Li Zhou, Gaofeng Liang, Danqi Feng, Yongcai Guo
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2020)
Article
Optics
Long Chen, Jia Liu, Xiaohu Zhang, Dongliang Tang
Article
Optics
Yingjie Zhou, Yide Yuan, Tibin Zeng, Xiangru Wang, Dongliang Tang, Fan Fan, Shuangchun Wen
Article
Chemistry, Physical
Long Chen, Zhenglong Shao, Jia Liu, Dongliang Tang
Summary: This study introduces an all-metallic reflective metasurface composed of numerous quasi-continuous nanostructures, achieving high-efficiency and broadband focusing performance. Through the same design strategy, a quasi-continuous metasurface with the ability to overcome the diffraction limit is also demonstrated, achieving a focal spot with a size of 0.8 times the diffraction limit.
Article
Physics, Applied
Wenjuan Du, Zhilang Lou, Xuesong Chen, Long Chen, Dongliang Tang
Summary: Researchers have designed an all-metallic multifunctional metasurface composed of aluminum nanorods, which can achieve near-field display and three-dimensional holography. Through optimized design, this metasurface can simultaneously display near-field grayscale patterns and far-field 3D images.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Physics, Applied
Long Chen, Zhenglong Shao, Jia Liu, Dongliang Tang
Summary: In this paper, a bifocal metalens is designed through simultaneous control of two polarization-dependent functions, allowing for the focusing of x-polarized and y-polarized light into different positions. The relative intensity between the two foci can be adjusted by rotating the incident linear polarization angle. The metalenses are composed of rectangle nanopillars with spatially varying widths and lengths, providing distinct propagating phases under orthogonal polarizations. Through powerful optimizations, two achromatic bifocal metalenses are constructed and numerically demonstrated. This approach has potential applications in micro-manipulation, optical communication, and multicolor display.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Optics
Dongliang Tang, Zhenglong Shao, Yingjie Zhou, Yu Lei, Long Chen, Jin Xie, Xiaohu Zhang, Xin Xie, Fan Fan, Lei Liao, Shuangchun Wen
Summary: As a fundamental material in display technology, liquid crystal (LC) possesses excellent properties for the development of next-generation flat optical devices. Current LC elements lack flexibility due to their single functionality. This paper proposes flat LC elements that can simultaneously achieve near-field display and far-field holography. Experimental demonstrations of two-channel LC elements generating grayscale patterns and independent holographic images are presented. Position and spatial multiplexing methodologies are introduced to enhance the information capacity.
LASER & PHOTONICS REVIEWS
(2022)
Article
Physics, Multidisciplinary
Yang Yang, Xiaohu Zhang, Kaifeng Liu, Haimo Zhang, Lintong Shi, Shichao Song, Dongliang Tang, Yongcai Guo
Summary: In this paper, a deep learning scheme is proposed to assist the design of complex-amplitude metasurfaces, making it easier and more efficient. The proposed method shows promising potential for designing more complex-amplitude meta-devices with multi-polarization and multi-wavelength multiplexing capabilities.
ANNALEN DER PHYSIK
(2022)
Article
Optics
Jiaqi Ren, Yingjie Zhou, Zhenglong Shao, Chen Zhu, Fan Fan, Dongliang Tang
Summary: Conventional optical imaging systems often face difficulties in integrating multiple lenses to eliminate chromatic aberration. Planar optical elements, such as metasurfaces and liquid crystals, have been developed as feasible solutions for flexible and lightweight systems. However, they still suffer from chromatic aberration, which can be corrected but requires complex device design. In this study, a geometric-phase-based axi-con lens is used along with a post-process algorithm to correct chromatic aberration across a wide range of wavelengths. The experimental results show significant improvement in reconstruction quality after applying the post-process algorithm. This work is expected to contribute to the development of reducing dispersion through both device design and computational image techniques.
Article
Nanoscience & Nanotechnology
Zhenglong Shao, Xin Xie, Yingjie Zhou, Xiaohu Zhang, Wenjuan Du, Fan Fan, Dongliang Tang
Summary: Liquid crystal elements with multifunctional properties are proposed, integrating surface display and binary-phase focusing lens. By controlling the complex amplitude of incident light, the elements can achieve high-definition surface pattern, optical focusing/imaging performance, and even bifocal lens with different focal lengths.