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Subwavelength planar structured interfaces, also known as metasurfaces, are ultra-thin optical elements modulating the amplitude, phase, and polarization of incident light using nanostructures called meta-atoms. The optical properties of such metasur
Externí odkaz:
http://arxiv.org/abs/2301.01160
Autor:
Hsu, Liyi, Ndao, Abdoulaye
In recent years, the need for high-power laser is of great interest for different applications ranging from direct-laser processing, light detection, medicine, and lighting. However, high-power lasers with high intensities give rise to fundamental pr
Externí odkaz:
http://arxiv.org/abs/2101.01249
Over the last few years, optical nanoantennas are continuously attracting interest owing to their ability to efficiently confine, localize resonance, and significantly enhanced electromagnetic fields at subwavelength scale. However, such strong confi
Externí odkaz:
http://arxiv.org/abs/2010.12990
Conventional optical components have been proposed to realize high-quality line focusing with uniform intensity distribution such as cylindrical lenses, segmented wedge-arrays, or a combination of prisms and spherical mirrors. However, numerous facto
Externí odkaz:
http://arxiv.org/abs/1804.02356
Metasurfaces are generally designed by placing scatterers in periodic or pseudo-periodic grids. We propose and discuss design rules for functional metasurfaces with randomly placed anisotropic elements. By analyzing the focusing performance of random
Externí odkaz:
http://arxiv.org/abs/1802.01202
Metasurfaces are generally designed by placing scatterers in a periodic grid. We propose and discuss design rules for efficient random and functional metasurfaces with anisotropic elements. We investigate the impact of the elements density on the per
Externí odkaz:
http://arxiv.org/abs/1708.07865
Metasurfaces are promising tools towards novel designs for flat optics applications. As such their quality and tolerance to fabrication imperfections need to be evaluated with specific tools. However, most such tools rely on the geometrical optics ap
Externí odkaz:
http://arxiv.org/abs/1701.03130
We demonstrate a novel and simple approach to cloaking a scatterer on a ground plane. We use an extremely thin dielectric metasurface ({\lambda}/12) to reshape the wavefronts distorted by a scatterer in order to mimic the reflection pattern of a flat
Externí odkaz:
http://arxiv.org/abs/1503.08486
Autor:
Ndao Abdoulaye, Hsu Liyi, Cai Wei, Ha Jeongho, Park Junhee, Contractor Rushin, Lo Yuhwa, Kanté Boubacar
Publikováno v:
Nanophotonics, Vol 9, Iss 5, Pp 1081-1086 (2020)
One of the key challenges in biology is to understand how individual cells process information and respond to perturbations. However, most of the existing single-cell analysis methods can only provide a glimpse of cell properties at specific time poi
Externí odkaz:
https://doaj.org/article/ee5090a887e34a219521d6f5cdc62c76
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