Article
Optics
Justin Stevens, Tigran Galstian
Summary: This article describes the design and operational principle of a new electrically tunable gradient index liquid crystal lens. The lens utilizes linear serpentine electrodes and does not require a semiconductor layer. Experimental results demonstrate that a lens with a 2 mm clear aperture has an optical power of 9.5 diopters and a root-mean-square wave-front error of 0.16 μm. The lens is tested with a miniature camera and the improvement in image quality is experimentally demonstrated.
Article
Computer Science, Information Systems
Salvador Moreno-Rodriguez, Miguel A. Balmaseda-Marquez, Javier Carmona-Murillo, Angel Palomares-Caballero
Summary: This article presents a 3-D printed Fresnel-lens antenna made of dielectric unit cells that are insensitive to polarization. The design allows for implementation in any azimuth orientation, simplifying the design process and providing robustness under different conditions. The prototype showed good agreement with the simulations, with a measured gain of 26.5 +/- 0.5 dBi and mean antenna efficiency of 79% from 55 GHz to 65 GHz.
Article
Optics
Harleen Kaur, Hari Shankar Singh
Summary: A polarization-insensitive multi-band metamaterial absorber for terahertz applications is proposed, with high absorption rates at multiple frequencies. The proposed absorber has potential applications in sensing, filtering, and imaging in the terahertz range.
Article
Engineering, Electrical & Electronic
Shubhadip Paul, Nilesh Kumar Tiwari, Mohammad Jaleel Akhtar
Summary: In this study, a novel highly directive GRIN metasurface (MS) lens integrated dielectric-filled horn antenna (DFHA) for effective monitoring and detection of deep tumors inside the body is developed. Two novel GRIN MS lens topologies are proposed, both utilizing an optimized refractive index distribution. The proposed lens-based DFHA demonstrates enhanced signal penetration and spatial resolution, making it suitable for tumor detection deep inside the body.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Materials Science, Composites
Tuo Zhang, Yuping Duan, Jiangyong Liu, Huifang Pang, Lingxi Huang, Xinran Ma, Yupeng Shi, Ben Ma
Summary: This study reports hierarchical metamaterials constructed from pyramid metastructure composites and Fibonacci spiral elements, with a wide effective absorption bandwidth. The use of multi-scale optimization and metastructure design is effective in improving multiple resonance thickness and wavefront transmission. The hybrid absorber exhibits robustness with incident angle across transverse magnetic polarization.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Optics
Hlib Kupianskyi, Simon A. R. Horsley, David B. B. Phillips
Summary: Multi-plane light converters (MPLCs) are a new class of optical devices that can convert a set of input spatial light modes to a new target set of output modes. They have potential applications in optical communications, optical computing, and optical imaging. We investigated high mode capacity MPLCs and developed a new inverse-design algorithm for better light control in these devices. Experimental results demonstrated the feasibility of prototype few-plane high-dimensional spatial mode sorters. Our work points to a promising future for high-dimensional MPLC-based technologies.
Article
Materials Science, Multidisciplinary
Yifeng Wen, Qi Zhang, Qiong He, Feifei Zhang, Lingxing Xiong, Fei Zhang, Guoquan Fu, Junwen Xu, Mingbo Pu, Xiangang Luo
Summary: An improved interferometric exposure system is proposed to acquire a large-size vectorial optical field for photo-alignment, and bifacial LC layers are applied to reduce the focal length while maintaining a large aperture, high diffraction efficiency, and light weight. A bifacial LC flat lens with a 10 cm diameter and 88.37% diffraction efficiency is fabricated, while the effective focal length is reduced from 91.5 cm to 46 cm. This work demonstrates the great advantages of LC-based flat lenses for flat optical systems with large aperture.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Optics
Jingli Wang, Liguo Huangfu, Heming Chen
Summary: A compact polarization-insensitive multimode interference triplexer has been proposed, utilizing material refractive index adjustment to achieve polarization insensitivity. Performance analysis shows that the triplexer is small in size, low in insertion loss, and has a large bandwidth, making it potentially valuable for FTTH applications.
JOURNAL OF MODERN OPTICS
(2021)
Article
Optics
Li-Lan Tian, Fan Chu, Wei Duan, Rui Li, Xiao-Qing Gu, Lei Li, Qiong-Hua Wang
Summary: The proposed micro-optical device utilizes PMA and BPLC for beam steering, demonstrating polarization-independent property and suitability for micro beam deflection, with deflection angle calculated using Snell's law. The deflection angle of the micro beam changes from 0 degrees to 1.65 degrees with increasing applied voltage.
OPTICS COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Hu Dou, Lu Wang, Fan Chu, Sheng-Dong Zhang, Qiong-Hua Wang
Summary: A Fresnel lens using blue phase liquid crystal (BPLC) material is proposed, allowing for focal length adjustment by altering the voltage applied on the edges of Fresnel zones. Increasing the number of identical Fresnel zones enables the creation of a BPLC lens with a larger aperture, maintaining high light control power, fast response time, and a thin BPLC layer.
Article
Engineering, Electrical & Electronic
Soumitra Biswas
Summary: This letter presents the design and implementation of a dual-polarized antenna feed matrix for a multibeam GRIN lens structure and investigates the effects of mutual coupling on the overall lens performance.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2023)
Article
Physics, Applied
Jinghong Wu, Xin Wang, Hui Xiao, Yuxin Wang, Zhenteng Fan, Huaiqing Zhang
Summary: In this paper, a wide-incidence-angle insensitive reflective metasurface multi-polarization converter is proposed, which utilizes split-ring resonators and cross oscillators structure. The simulated results demonstrate that the polarization conversion ratio for linear to linear (LTL) polarization conversion is above 90% in three frequency bands, and the axial ratio for linear to circular (LTC) polarization conversion is below 3 dB in four frequency bands. The polarization conversion is not affected by the incidence angle when tilted by 45° in both transverse electric and transverse magnetic modes. A fabricated sample consisting of 18 x 18 unit cells is measured to verify the polarization conversion performance.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Optics
Chi Zhang, Rui Niu, Pengfei Sha, Xiaoshuai Li, Hongmei Ma, Yubao Sun
Summary: This paper proposes an angle-insensitive waveplate with an inner helix structure, addressing the serious defect of angle-sensitivity in birefringent waveplates. The measured retardation-shift is significantly lower than that of conventional waveplates, and the self-compensation effect principle explains the angle-insensitivity. The application of the inner helical waveplate in wide color gamut display demonstrates its broad application prospects.
Article
Chemistry, Multidisciplinary
Meng Fan, Fanxi Meng, Yuteng Qian, Hao Tang, Yibo Xin, Jun Xing, Hongyu Xing, Wenjiang Ye
Summary: Based on the traditional structure of in plane switching liquid crystal display, a cylindrical liquid crystal micro-lens array driven by interdigital electrodes is proposed and studied. The results show that this structure can be used to fabricate cylindrical liquid crystal micro-lens, and narrow electrodes should be selected for lens production. The focal length of the liquid crystal micro-lens decreases with the increase of the driving voltage, and when the driving voltage is between 3 V-rms and 5.5 V-rms, the lens exhibits good focusing quality.
Article
Optics
Sen Chen, Jie-Dong Bi, Guowen Ding, Shenyun Wang, Xin-Yao Luo
Summary: In this work, a transmission-type polarization-insensitive cross-polarization converter (CPC) based on frequency selective surface (FSS) is proposed. The FSS-based CPC utilizes the substrate integrated waveguide design to achieve highly efficient transmissive cross-polarization conversion. Experimental results demonstrate excellent agreement with numerical simulation results and theoretical predictions, with a peak cross-polarization conversion ratio of -0.27 dB at the operating frequency.
OPTICS COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Chien-Yu Chen, Wei-Kai Lee, Yi-Jiun Chen, Chun-Yang Lu, Hoang Yan Lin, Chung-Chih Wu
ADVANCED MATERIALS
(2015)
Article
Chemistry, Physical
Tsung-Han Tsai, Ming-Yi Lin, Wing-Kit Choi, Hoang Yan Lin
INTERNATIONAL JOURNAL OF PHOTOENERGY
(2015)
Article
Physics, Applied
Yi-Cheng Liu, Sih-Min Chen, Jhong-Han Liu, Hsiang-Wei Hsu, Hoang-Yan Lin, Szu-Yuan Chen
JOURNAL OF APPLIED PHYSICS
(2015)
Article
Optics
Shih-Yu Tu, Hoang Yan Lin, Tsung-Xian Lee
Article
Engineering, Electrical & Electronic
Ming-Yi Lin, Tsung-Han Tsai, Li-Jen Hsiao, Wei-Chen Tu, Shang-Hsuan Wu, Lon A. Wang, Si-Chen Lee, Hoang Yan Lin
IEEE PHOTONICS TECHNOLOGY LETTERS
(2016)
Article
Physics, Applied
Tsung-Han Tsai, Ming-Yi Lin, Li-Jen Hsiao, Wing-Kit Choi, Hoang Yan Lin
JAPANESE JOURNAL OF APPLIED PHYSICS
(2016)
Article
Optics
Tsung-Han Tsai, Ming-Yi Lin, Li-Jen Hsiao, Wing-Kit Choi, Hoang Yan Lin
OPTICAL ENGINEERING
(2016)
Article
Optics
Chien-Yu Chen, Yi-Jiun Chen, Wei-Kai Lee, Chun-Yang Lu, Hoang Yan Lin, Chung-Chih Wu
Article
Optics
Chen-Hung Lin, Li-Jen Hsiao, Jing-Ting Hsaio, Hoang Yan Lin
Article
Optics
Yan-Shuo Chang, Chia-Hsin Lin, Ku-Hui Hsu, Wei-Feng Hsu, Li-Jen Hsiao, Hoang Yan Lin
Article
Optics
Yan-Shuo Chang, Wei-Feng Hsu, Ku-Hui Hsu, Hoang Yan Lin
Article
Optics
Shih-Yu Tu, Hoang Yan Lin, Min-Ching Lin
Article
Optics
Ming-Yi Lin, Tsung-Han Tsai, Yu Ling Kang, Yu-Cheng Chen, Yi-Hsiang Huang, Yi-Jiun Chen, Xiang Fang, Hoang Yan Lin, Wing-Kit Choi, Lon A. Wang, Chung-Chih Wu, Si-Chen Lee
Article
Optics
Ming-Yi Lin, Yu Ling Kang, Yu-Cheng Chen, Tsung-Han Tsai, Shih-Chieh Lin, Yi-Hsiang Huang, Yi-Jiun Chen, Chun-Yang Lu, Hoang Yan Lin, Lon A. Wang, Chung-Chih Wu, Si-Chen Lee
Article
Optics
Kuo-Chung Huang, Yi-Heng Chou, Lang-chin Lin, Hoang Yan Lin, Fu-Hao Chen, Ching-Chiu Liao, Yi-Han Chen, Kuen Lee, Wan-Hsuan Hsu
