Results 1 to 10 of about 9,921 (113)

Targeted Sub-Attomole Cancer Biomarker Detection Based on Phase Singularity 2D Nanomaterial-Enhanced Plasmonic Biosensor [PDF]

Nano-Micro Letters, 2021
Highlights A zero-reflection-induced phase singularity is achieved through precisely controlling the resonance characteristics using two-dimensional nanomaterials. An atomically thin nano-layer having a high absorption coefficient is exploited to enhance
Yuye Wang, Shuwen Zeng, Aurelian Crunteanu, Zhenming Xie, Georges Humbert, Libo Ma, Yuanyuan Wei, Aude Brunel, Barbara Bessette, Jean-Christophe Orlianges, Fabrice Lalloué, Oliver G. Schmidt, Nanfang Yu, Ho-Pui Ho   +13 more
doaj   +3 more sources

M/M/Infinity Birth-Death Processes – A Quantitative Representational Framework to Summarize and Explain Phase Singularity and Wavelet Dynamics in Atrial Fibrillation [PDF]

Frontiers in Physiology, 2021
RationaleA quantitative framework to summarize and explain the quasi-stationary population dynamics of unstable phase singularities (PS) and wavelets in human atrial fibrillation (AF) is at present lacking.
Dhani Dharmaprani, Dhani Dharmaprani, Evan Jenkins, Martin Aguilar, Jing X. Quah, Jing X. Quah, Anandaroop Lahiri, Kathryn Tiver, Lewis Mitchell, Pawel Kuklik, Christian Meyer, Stephan Willems, Richard Clayton, Martyn Nash, Stanley Nattel, Andrew D. McGavigan, Andrew D. McGavigan, Anand N. Ganesan, Anand N. Ganesan   +18 more
doaj   +2 more sources

Standardizing Single-Frame Phase Singularity Identification Algorithms and Parameters in Phase Mapping During Human Atrial Fibrillation [PDF]

Frontiers in Physiology, 2020
PurposeRecent investigations failed to reproduce the positive rotor-guided ablation outcomes shown by initial studies for treating persistent atrial fibrillation (persAF).
Xin Li, Xin Li, Tiago P. Almeida, Tiago P. Almeida, Tiago P. Almeida, Nawshin Dastagir, María S. Guillem, João Salinet, Gavin S. Chu, Peter J. Stafford, Fernando S. Schlindwein, Fernando S. Schlindwein, G. André Ng, G. André Ng   +13 more
doaj   +2 more sources

The influence of shot noise on the performance of phase singularity-based refractometric sensors [PDF]

Nanophotonics
Topological singularities of optical response functions – such as reflection amplitudes – enable elegant practical applications ranging from analog signal processing to novel molecular sensing approaches.
Maslova Valeria, Ermolaev Georgy, Andrianov Evgeny S., Arsenin Aleksey V., Volkov Valentyn S., Baranov Denis G.   +5 more
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Dielectric metasurfaces based on a phase singularity in the region of high reflectance [PDF]

Nanophotonics
Metasurfaces, two-dimensional planar optical devices based on subwavelength-scale structures, have garnered significant attention for their potential to replace conventional optical components in various fields. These devices can manipulate the amplitude,
Jang Jaewon, Park Minsu, Kang Hyeonjeong, Han Gyu-Won, Cho Hui Jae, Park Yeonsang   +5 more
doaj   +2 more sources

Evolution of the Phase Singularity of an Orbital Angular Momentum Beam with an Astigmatism Phase

Photonics
In this study, we explore the impact of the astigmatism phase on the evolution of the phase singularity of an orbital angular momentum (OAM) beam propagating through free space. The results demonstrate that the high-order phase singularity dispersed into
Chunhao Liang, Cuiling Zheng, Xinru Lian, Qian Chen, Yaru Gao, Jinsong Liu, Yangjian Cai, Jun Zeng   +7 more
doaj   +3 more sources

Topological Charge of Multi-Color Optical Vortices

Photonics, 2022
The topological charge of an optical vortex is a quantity rather stable against phase distortions, for example, turbulence. This makes the topological charge attractive for optical communications, but for many structured beams it is unknown.
Victor Victorovich Kotlyar, Alexey Andreevich Kovalev, Anton Gennadyevich Nalimov, Sergey Sergeevich Stafeev   +3 more
doaj   +1 more source

Reusable Biosensor Based on Differential Phase Detection at the Point of Darkness

Advanced Photonics Research, 2021
A differential phase sensor based on a narrowband perfect absorber uses the phase singularity at the point of darkness (100% absorption). Herein, a structure with a top SiO2 layer is proposed that is index matched with a glass flow cell that shows the ...
Shilpa Samdani, Abhinav Kala, Rishabh Kaurav, Sruthi Kaladharan, Venu Gopal Achanta   +4 more
doaj   +1 more source

Engineering phase and polarization singularity sheets

Nature Communications, 2021
Metasurfaces allow for vast possibilities of light control. Here, the authors demonstrate on-demand engineering and realization of a broad family of two-dimensional phase singularity sheets and transverse polarization singularity sheets, opening up new ...
Soon Wei Daniel Lim, Joon-Suh Park, Maryna L. Meretska, Ahmed H. Dorrah, Federico Capasso   +4 more
doaj   +1 more source

Deep-learning-based recognition of multi-singularity structured light

Nanophotonics, 2021
Structured light with customized topological patterns inspires diverse classical and quantum investigations underpinned by accurate detection techniques.
Wang Hao, Yang Xilin, Liu Zeqi, Pan Jing, Meng Yuan, Shi Zijian, Wan Zhensong, Zhang Hengkang, Shen Yijie, Fu Xing, Liu Qiang   +10 more
doaj   +1 more source