Optical nanoantennas capable of converting external electromagnetic fields into confined energy and vice versa play a very important role in optical field manipulation. Among them, the bowtie antenna has received extensive ...
Optics & Photonics
Jun 2, 2022
0
32
A hand-held laser pointer produces no noticeable recoil forces when it is "fired"—even though it emits a directed stream of light particles. The reason for this is its very large mass compared to the very small recoil impulses ...
Nanophysics
Apr 21, 2022
1
161
Understanding how light waves oscillate in time as they interact with materials is essential to understanding light-driven energy transfer in materials, such as solar cells or plants. Due to the fantastically high speeds ...
Optics & Photonics
Apr 30, 2021
0
3035
Researchers have announced a prototype for a laser at the heart of the first space-based gravitational wave observatory, known as the Laser Interferometer Space Antenna (LISA) mission. The team's new laser nearly meets the ...
Optics & Photonics
Sep 18, 2019
0
35
Antennas catch radio waves, a form of electromagnetic radiation, from the air and convert the energy into electrical signals that feed modern telecommunications. They can also convert electrical signals into radio waves. ...
Optics & Photonics
Mar 13, 2019
0
5
Electrons inside an atom whip around the nucleus like satellites around the Earth, occupying orbits determined by quantum physics. Light can boost an electron to a different, more energetic orbit, but that high doesn't last ...
Optics & Photonics
Feb 4, 2019
0
129
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 ...
Nanophysics
Nov 16, 2018
0
10
NASA Small Spacecraft Technology Program's Integrated Solar and Reflectarray Antenna, or ISARA, and Optical Communications and Sensor Demonstration, or OCSD, spacecraft recently completed systems checkout and have moved into ...
Space Exploration
Mar 30, 2018
0
30
Atoms and molecules can be made to emit photons. However, without external intervention, this process is inefficient and undirected. If it was possible to influence the process of photon creation in terms of efficiency and ...
Optics & Photonics
Dec 12, 2017
0
81
On 27 July 2017, the newly built Low Frequency Array (LOFAR) station in Ireland will be officially opened. This extends the largest radio telescope in the world, connecting to its central core of antennas in the north of ...
Space Exploration
Jul 28, 2017
0
7
