Optical antennas, analogues of microwave and radiowave antennas, are a new concept in physical optics 1. They are an enabling technology for manipulating and controlling optical radiation at ...

Researchers have developed arrays of tiny nano-antennas that can enable sensing of molecules that resonate in the infrared spectrum. The semiconductor antenna arrays allow long-wavelength light to ...

This is equivalent to an array of 64 × 64 antenna units, or pixels, with each pixel covering 9 × 9µm. The antennas are made from a strong, high-index contrast dielectric grating and all work at the ...

The figure shows how much light (PLE, photoluminescence excitation) the individual pyramid-shaped antenna emits at various wavelengths (colours) of light in comparison to the antennas in the array.

The array of aligned, but randomly placed, carbon nanotubes (Image: Wang, et al, Applied Physics Letters) The tubes were about 50 nanometers wide, hundreds of nanometers long and aligned randomly.

Phased array antenna systems are at the cusp of ubiquity. We now see Multiple-Input Multiple-Output (MIMO) antenna systems on WiFi routers. Soon phased array weather radar systems will help to pred… ...

Antenna-on-a-chip rips the light fantastic Date: November 16, 2012 ... "You have an array of pixels and you can change the transmission of each pixel at a very high speed," he said.

Such antennas have long been used to transmit radio and television signals, but in the last decade or so researchers have begun to extend the phased-array concept to visible wavelengths. Since ...

In recent years, Sengupta’s lab has designed antenna arrays that help engineers make strides toward peering through matter, boosting communications in canyons of skyscrapers, putting a medical lab on ...