Robotics

A fairy-like robot flies by the power of wind and light

The development of stimuli-responsive polymers has brought about a wealth of material-related opportunities for next-generation small-scale, wirelessly controlled soft-bodied robots. For some time now, engineers have known ...

Other

Best of Last Year: The top Tech Xplore articles of 2022

It was an interesting year for technology research, as a team at Stanford University found that the practice of charging cars in the evenings or at night will overstress the electric grid in the years to come. They suggested ...

Robotics

Smart microrobots walk autonomously with electronic 'brains'

Cornell University researchers have installed electronic "brains" on solar-powered robots that are 100 to 250 micrometers in size—smaller than an ant's head—so that they can walk autonomously without being externally ...

Internet

Project Taara beams the Internet across the Congo River

A team of researchers at Alphabet's research and development company, X, working on what has been named Project Taara, has successfully set up a laser-based system for beaming the internet across the Congo River at speeds ...

Robotics

Microscopic robots 'walk' thanks to laser tech

A Cornell University-led collaboration has created the first microscopic robots that incorporate semiconductor components, allowing them to be controlled—and made to walk—with standard electronic signals.

Engineering

Lasers enable engineers to weld ceramics, no furnace required

Smartphones that don't scratch or shatter. Metal-free pacemakers. Electronics for space and other harsh environments. These could all be made possible thanks to a new ceramic welding technology developed by a team of engineers ...

Engineering

Finding keyholes in metals 3-D printing

Additive manufacturing's promise to revolutionize industry is constrained by a widespread problem: tiny gas pockets in the final product, which can lead to cracks and other failures.

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Laser

A laser is a device that emits light (electromagnetic radiation) through a process called stimulated emission. The term laser is an acronym for light amplification by stimulated emission of radiation. Laser light is usually spatially coherent, which means that the light either is emitted in a narrow, low-divergence beam, or can be converted into one with the help of optical components such as lenses. Typically, lasers are thought of as emitting light with a narrow wavelength spectrum ("monochromatic" light). This is not true of all lasers, however: some emit light with a broad spectrum, while others emit light at multiple distinct wavelengths simultaneously. The coherence of typical laser emission is distinctive. Most other light sources emit incoherent light, which has a phase that varies randomly with time and position.

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