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A nanoscale optical antenna developed by researchers at A*STAR allows the manipulation of visible light waves on the scale of microchips. Such nanoantennae may enable the development of high-resolution imaging systems in small mobile devices.
Photons in light beams can carry more information than electrons traveling through electrical wiring. If light could be directed within nanoscale chips as a means of wireless data transfer, it could open the way for technologies such as high-speed imaging for medical uses, and phone screens that boast high resolution, three-dimensional displays.
Jinfa - Ho - Joel - Yang - Arseniy
Now, Jinfa Ho, Joel Yang, and Arseniy Kuznetsov and their team at A*STAR's Institute of Materials Research and Engineering have developed a nanoscale antenna that can transmit light waves at the chip scale. Crucially, their design is the first to enable precise control of the direction that the light waves are traveling, while limiting radiation leakage that could create interfering crosstalk between components.
Most people would recognize pronged radio antennae from building roofs, comprising an active feed element and a series of parallel metal rods, or 'dipole directors'. This design, called a Yagi-Uda antenna, is a highly successful method of transmitting radio waves; the size of each dipole is designed to respond to radio waves of specific wavelengths and direct them as needed.
Yagi-Uda - Antennas - Wavelength - Regime
"For Yagi-Uda antennas to operate in the optical wavelength regime,...
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