Plasmon generation circuits in plastic, Researchers have developed an optical nano-antenna. The antenna can be turned on and off and activates a new type of nano-optical component that can be controlled.
Plasma is created when light interacts with metal nanoparticles. Incident light forms a collective vibration, a movement of electrons in a particle. This collective vibration is a plasmon.
The metal nanostructure and its ability to produce light in the nanometer range has been investigated by many research groups around the world, for example to use it in biosensors and energy conversion devices and to strengthen other optical phenomena.
Polymers consist of long chains of atoms bound and to conductive polymers, positive charges along the polymer chain are responsible for electrical conductivity.
Our organic antennas can be transparent to visible light because they react to light with a slightly longer wavelength, which makes it attractive for applications such as smart windows, according to researchers.
First, researchers carry out theoretical calculations and use simulations to design experiments that they can then do. this group has succeeded in producing billions of tiny nanometer disks from organic conductive materials on the surface. This small hard drive responds to light and acts as a mini antenna.
Researchers have shown that the diameter and thickness of the discs determine the frequency of the light they respond to. Thus it is possible to control this wavelength by changing the disk geometry. The thicker the disk, the higher the frequency. They also hope that by changing the polymer used, they can increase the wavelength range in which the nanotubes respond.
Materials produced in the laboratory are initially in an oxidized state and nano-antennas are included.
We have shown that when reducing a material by exposing it to steam, we can exclude conductivity and also the antenna.
If we then oxidize again, for example with sulfuric acid, the conductivity returns and the nano-antenna turns on again. This is a relatively slow process at the moment, but we have taken the first step and demonstrated that it is possible.