Fiber Optic Fabric. As fiber optics have become more popular in wearables, fiber optic fabric is now available. Here the strands are stitched together into a ...

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Materials provided by University of Cambridge. The original story is licensed under a Creative Commons Licence. Note: Content may be edited for style and length.

For centuries, scientists believed that light, like all waves, couldn't be focused down smaller than its wavelength, just under a millionth of a metre. Now, researchers led by the University of Cambridge have created the world's smallest magnifying glass, which focuses light a billion times more tightly, down to the scale of single atoms.

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"Our models suggested that individual atoms sticking out might act as tiny lightning rods, but focusing light instead of electricity," said Professor Javier Aizpurua from the Center for Materials Physics in San Sebastian, who led the theoretical section of this work.

Jun 27, 2024 — A Fresnel light is not the same as a floodlight. While a Fresnel can throw out wide beams, there is a difference — floodlights offer no ...

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According to the researchers, building nanostructures with single atom control was extremely challenging. "We had to cool our samples to -260°C in order to freeze the scurrying gold atoms," said Felix Benz, lead author of the study. The researchers shone laser light on the sample to build the pico-cavities, allowing them to watch single atom movement in real time.

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High definition lenses enable patients to enjoy up to 20 percent wider vision channel for both intermediate and near distances.

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The findings have the potential to open a whole new field of light-catalysed chemical reactions, allowing complex molecules to be built from smaller components. Additionally, there is the possibility of new opto-mechanical data storage devices, allowing information to be written and read by light and stored in the form of molecular vibrations.

In collaboration with colleagues from Spain, the team used highly conductive gold nanoparticles to make the world's tiniest optical cavity, so small that only a single molecule can fit within it. The cavity -- called a 'pico-cavity' by the researchers -- consists of a bump in a gold nanostructure the size of a single atom, and confines light to less than a billionth of a metre. The results, reported in the journal Science, open up new ways to study the interaction of light and matter, including the possibility of making the molecules in the cavity undergo new sorts of chemical reactions, which could enable the development of entirely new types of sensors.

Any optical system, such as a telescope, camera or microscope, can be described by a just few basic numbers. Aperture is the main lens or mirror that gathers ...

"Even single gold atoms behave just like tiny metallic ball bearings in our experiments, with conducting electrons roaming around, which is very different from their quantum life where electrons are bound to their nucleus," said Professor Jeremy Baumberg of the NanoPhotonics Centre at Cambridge's Cavendish Laboratory, who led the research.

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20201127 — 80-100 lpi are recommended in this thread, lower lpi having less diffraction, and higher lpi showing curvature better. Danny uses both. They all ...

Oct 24, 2024 — Light waves are transverse: that is, the vibrating electric vector associated with each wave is perpendicular to the direction of propagation. A ...

Augustin Fresnel was the first to do this calculation (1820's). Fresnel Equations—Perpendicular E field. Page 7. n i n t i k. r k. t k. θi θr θt.