Results 1 to 10 of about 659,998 (372)
Gate-tunable negative refraction of mid-infrared polaritons [PDF]
Science, 2022 Negative refraction provides a platform to manipulate mid-infrared and terahertz radiation for molecular sensing and thermal emission applications. However, its implementation based on metamaterials and plasmonic media presents challenges with optical ...
Hai Hu +13 more
semanticscholar +1 more source
Negative refraction in hyperbolic hetero-bicrystals [PDF]
Science, 2022 We visualized negative refraction of phonon polaritons, which occurs at the interface between two natural crystals. The polaritons—hybrids of infrared photons and lattice vibrations—form collimated rays that display negative refraction when passing ...
A. Sternbach +14 more
semanticscholar +1 more source
Effects of Fractures on Buildings and Road Construction: A Case Study of Area BZ, Ahmadu Bello University, Zaria, Nigeria [PDF]
Physics Access, 2023 Structural collapse due to the absence of geophysical information has become a major concern in the construction and building industries today. In this research, we reported the effect of fracture on some selected buildings in Area BZ, Ahmadu Bello ...
Inalegwu A Ngbede +4 more
doaj +1 more source
Folia Medica Indonesiana, 2021 Introduction: Management of low vision in pediatric patients with greater result can affect their quality of life than in adult low vision patients.. Retinopathy of Prematurity is the main cause of blindness in children.
Christina Aritonang
doaj +1 more source
Time-refraction optics with single cycle modulation
Nanophotonics, 2023 We present an experimental study of optical time-refraction caused by time-interfaces as short as a single optical cycle. Specifically, we study the propagation of a probe pulse through a sample undergoing a large refractive index change induced by an ...
Eran Lustig +10 more
semanticscholar +1 more source
Frontiers in Pediatrics, 2022 BackgroundTo investigate the risk factors for change in refraction and refractive components in preschoolers.MethodsPreschool children aged 3–5 years old, from the junior and the middle grades of seven randomly selected kindergartens in Jia Ding District,
Yingyan Ma +12 more
doaj +1 more source
Negative refraction makes a perfect lens [PDF]
Physical Review Letters, 2000 With a conventional lens sharpness of the image is always limited by the wavelength of light. An unconventional alternative to a lens, a slab of negative refractive index material, has the power to focus all Fourier components of a 2D image, even those ...
JB Pendry
semanticscholar +1 more source
Frontiers in Public Health, 2023 PurposeTo explore the associations between anthropometric indicators and refraction in school-aged children in the post-COVID-19 era.MethodsData were collected from 25,644 children aged 7 to 12 years in 48 elementary schools in Tianjin. The comprehensive
Wenzheng Du +14 more
doaj +1 more source
Planar refraction and lensing of highly confined polaritons in anisotropic media
Nature Communications, 2021 Refraction between isotropic media is characterized by light bending towards the normal to the boundary when passing from a low- to a high-refractive-index medium.
J. Duan +15 more
semanticscholar +1 more source
Ocular Refraction at Birth and Its Development During the First Year of Life in a Large Cohort of Babies in a Single Center in Northern Italy [PDF]
, 2020 The purpose of this study was to investigate refraction at birth and during the first year of life in a large cohort of babies born in a single center in Northern Italy.
Bartollino S. +7 more
core +1 more source