Results 51 to 60 of about 3,478,957 (237)

Full-space inverse-designed meta-optics for complex vector field shaping of intracavity landscapes

Light: Science & Applications
The sophisticated shaping of electromagnetic field landscapes, both outside and inside optical cavities, has long been an important goal of optics and photonics, with broad applications in near-field imaging, lithography, and laser science.
Mingfeng Xu, Di Sang, Mingbo Pu, Ping Gao, Bowen Zhao, Yuhan Zheng, Qingji Zeng, Lianwei Chen, Fei Zhang, Yinghui Guo, Xiong Li, Xiaoliang Ma, Yunqi Fu, Xiangang Luo   +13 more
doaj   +1 more source

Polarization-Enhanced Underwater Detection Method for Multiple Material Targets Based on Deep-Learning

IEEE Photonics Journal, 2023
Underwater target detection is an essential topic in the applications of underwater exploration. However, underwater target detection faces serious challenges, such as complex scattering, low visibility, and target clutter.
Guochen Wang, Jie Gao, Yubin Chen, Xin Wang, Jiangtao Li, Khian-Hooi Chew, Rui-Pin Chen   +6 more
doaj   +1 more source

Non-Line-of-Sight Target Tracking With a Single Time Multiplexed Channel

IEEE Photonics Journal
Here we propose a non-line-of-sight (NLOS) tracking scheme using only one single-pixel single-photon channel. It is demonstrated that sending multiple beams with proper time delay enables multiplexing of multi-echoes of the hidden object in the single ...
Xianmin Zheng, Tailin Li, Ke Ding, Yihan Luo   +3 more
doaj   +1 more source

Force measurements with optical tweezers inside living cells

, 2014
The force exerted by optical tweezers can be measured by tracking the momentum changes of the trapping beam, a method which is more general and powerful than traditional calibration techniques as it is based on first principles, but which has not been ...
Farre, A., Martin-Badosa, E., Josep Mas, Jordi Sancho-Parramon, Arnau Farré, Sancho-Parramon, J., Montes-Usategui, M., Mario Montes-Usategui, Mas, J., Estela Martín-Badosa   +9 more
core   +1 more source

Longitudinally continuous varying high-order cylindrical vector fields enabled by spin-decoupled metasurfaces

Nanophotonics
The manipulation of vector optical fields in three-dimensional (3D) space plays a vital role in both fundamental research and practical implementations of polarization optics.
He Xinye, Bao Hanlin, Zhang Fei, Kang Tongtong, Pu Mingbo, Chen Yan, Guo Yinghui, Gong Jintao, Xu Mingfeng, Luo Xiangang   +9 more
doaj   +1 more source

Low Altitude UAV Detection in Complex Contexts

IEEE Access
With the rapid development of drone technology and its widespread application in various fields, low-altitude drone detection has become an important technological approach for ensuring public safety and implementing effective supervision.
Zhengwei Tang, Wen Lu, Weihua Tang, Dong He, Yongmei Huang, Qiang Wang   +5 more
doaj   +1 more source

Optical vortices 30 years on: OAM manipulation from topological charge to multiple singularities

Light: Science & Applications, 2019
Thirty years ago, Coullet et al. proposed that a special optical field exists in laser cavities bearing some analogy with the superfluid vortex. Since then, optical vortices have been widely studied, inspired by the hydrodynamics sharing similar ...
Yijie Shen, Xuejiao Wang, Zhenwei Xie, C. Min, Xing Fu, Qiang Liu, M. Gong, Xiaocong Yuan   +7 more
semanticscholar   +1 more source

Dynamic nonlocal metasurface for multifunctional integration via phase-change materials

Nanophotonics
Non-local metasurface supporting geometric phases at bound states in the continuum (BIC) simultaneously enables sharp spectral resonances and spatial wavefront shaping, thus providing a diversified optical platform for multifunctional devices. However, a
Yu Shilin, Xu Mingfeng, Pu Mingbo, Tang Xi, Zheng Yuhan, Guo Yinghui, Zhang Fei, Li Xiong, Ma Xiaoliang, Luo Xiangang   +9 more
doaj   +1 more source

Influence of Lithography Process Parameters on Continuous Surface Diffractive Optical Elements for Laser Beam Shaping

Micromachines
To address the demand for laser beam-shaping techniques, we developed a one-step exposure process based on moving-mask lithography for the fabrication of a continuous-surface diffractive optical element (DOE) for laser beam shaping.
Wenjing Liu, Axiu Cao, Junbo Liu, Hui Pang, Qiling Deng, Jian Wang, Song Hu   +6 more
doaj   +1 more source

A Hybrid-Scale Feature Enhancement Network for Hyperspectral Image Classification

Remote Sensing, 2023
Due to their devastating ability to extract features, convolutional neural network (CNN)-based approaches have achieved tremendous success in hyperspectral image (HSI) classification.
Dongxu Liu, Tao Shao, Guanglin Qi, Meihui Li, Jianlin Zhang   +4 more
doaj   +1 more source