Results 81 to 90 of about 80,548 (342)

Replay as wavefronts and theta sequences as bump oscillations in a grid cell attractor network

eLife, 2019
Grid cells fire in sequences that represent rapid trajectories in space. During locomotion, theta sequences encode sweeps in position starting slightly behind the animal and ending ahead of it. During quiescence and slow wave sleep, bouts of synchronized
Louis Kang, Michael R DeWeese
doaj   +1 more source

Nonlinear wavefront shaping with optically induced three-dimensional nonlinear photonic crystals

Nature Communications, 2019
Generation of coherent light with desirable amplitude and phase profiles throughout the optical spectrum is a key issue in optical technologies. Nonlinear wavefront shaping offers an exceptional way to achieve this goal by converting an incident light ...
Shan Liu, K. Switkowski, Chenglong Xu, Jie Tian, B. Wang, P. Lu, W. Krolikowski, Y. Sheng   +7 more
semanticscholar   +1 more source

Advances in Mode (De)Multiplexing Technologies via Circularly Symmetric Structured Light Beams

Advanced Photonics Research, EarlyView.
This review presents a comprehensive overview of mode (de)multiplexing technologies using circularly symmetric structured light beams, encompassing strategies of beam splitter combinations, multiorder diffractive gratings, optical coordinate transformations, angular dispersion lenses, multilayer cascaded modulations, and multidimensional hybrid (de ...
Qingji Zeng, Shu Chen, Zhibin Wu, Junmin Liu, Huapeng Ye, Gaiqing Zhao, Dianyuan Fan, Shuqing Chen   +7 more
wiley   +1 more source

Spin-controlled wavefront shaping with plasmonic chiral geometric metasurfaces

Light: Science & Applications, 2018
Metasurfaces, as a two-dimensional (2D) version of metamaterials, have drawn considerable attention for their revolutionary capability in manipulating the amplitude, phase, and polarization of light.
Yang Chen, Xiaodong Yang, Jie Gao
semanticscholar   +1 more source

Topological Berry Antenna on a Silicon Chip for Terahertz Wireless Communication

Advanced Photonics Research, EarlyView.
The on‐chip topological Berry antenna for 6G to Xth‐generation wireless communication is designed via integrating various Berry curvatures for an enhanced antenna aperture and radiation gain. This THz antenna has demonstrated a maximum gain of 17 dBi and chip‐to‐chip wireless communications at 20 Gbps over a distance of 15 cm.
Sonu Kumar, Ridong Jia, Yi Ji Tan, Thomas Caiwei Tan, Pascal Szriftgiser, G. Arun Kumar, Guillaume Ducournau, Arokiaswami Alphones, Ranjan Singh   +8 more
wiley   +1 more source

Exploring Phonon Interference: Insights From a Nano‐Scale Silicon Double Slit Atomistic Simulation

Advanced Theory and Simulations, EarlyView.
Classical Waves at the Atomic Scale: Molecular Dynamics Reveal Phonon Interference in Silicon Nanostructures. Abstract In this study, the classic double‐slit experiment, originally developed for light waves is successfully adapted, to investigate the behavior of phonons in crystalline silicon.
Efstratios Nikidis, Paul Desmarchelier, Yoshiaki Nakamura, Anne Tanguy, Konstantinos Termentzidis, Joseph Kioseoglou   +5 more
wiley   +1 more source

Repeatability and Interchangeability of Topometric, Anterior Chamber and Corneal Wavefront Data Between Two Scheimpflug Camera Devices

Clinical Ophthalmology, 2020
Hesham Mohamed Gharieb,1,2 Hisham Samy Shalaby,3 Ihab Saad Othman4,5 1Faculty of Medicine, Ain Shams University, Cairo, Egypt; 2Research and Development, Eye World Hospital, Giza, Egypt; 3Department of Ophthalmology, Faculty of Medicine, Ain Shams ...
Gharieb HM, Shalaby HS, Othman IS
doaj  

DNN-based aberration correction in a wavefront sensorless adaptive optics system.

Optics Express, 2019
Existing wavefront sensorless (WFS-less) adaptive optics (AO) generally require a search algorithm that takes lots of iterations and measurements to get optimal results. So the latency is a serious problem in the current WFS-less AO system, especially in
Qinghua Tian, Chenda Lu, Bo Liu, Lei Zhu, Xiaolong Pan, Qi Zhang, Leijing Yang, Feng Tian, X. Xin   +8 more
semanticscholar   +1 more source

Polarization Decoupling Multi‐Port Beam‐Splitting Metasurface for Miniaturized Magneto‐Optical Trap

Advanced Science, EarlyView.
A meta‐device‐based six‐beam delivery system is proposed for miniaturized MOT, featuring a novel polarization decoupling multi‐port beam‐splitting (PD‐MPBS) metasurface using propagation and geometric phases. The fabricated PD‐MPBS samples exhibit high beam‐splitting power uniformity (within 4.4%) and polarization purities (91.3–93.2%).
Tian Tian, Chen Qing, Yuxuan Liao, Jiajun Zhu, Yongzhuo Li, Xue Feng, Dengke Zhang, Yidong Huang   +7 more
wiley   +1 more source

The Correction of Eye Wavefront Using Contact Lenses and Their Impact on the Accommodative Response

Российский офтальмологический журнал, 2018
Eye wavefront aberrations have a strong impact on the formation of an image on the retina and vision quality. A relationship has also been found between the aberrations and accommodation, which plays a significant role in visual performance and ...
E. P. Tarutta, S. G. Arutyunyan, S. V. Milash   +2 more
doaj   +1 more source