The discovery, known as acoustic plasmon, could have applications in the design of ultra-high velocity electronic devices for data storage, for use in nano-optics or biomaterials, as well as in the creation of new materials for medical applications.
A plasmon is a charged wave formed by the group excitation of electrons. An acoustic plasmon is a type of surface plasmon produced by the interaction between light and metal surfaces.
The main difference between common surface plasmons – known for half a century – and the new, acoustic plasmons is that each of these is created with a different amount of energy. The acoustic plasmon multiplies its possible applications on using less energy.
In concrete, while common surface plasmons need 10 electron-volts of energy to become excited – a relatively high value for many technological applications – the acoustic plasmon can be triggered into an excited state with very low levels of energy input – less than 1 electron-volt.
One of the authors of the research, Eugene Chulkov, who works at the Centre of Materials Physics, explains the find as follows: "When light falls on a metal surface, the metal electrons interact with the electromagnetic field of light and create other waves, called plasmons".
Chulkov provides a more graphic example in order to understand the phenomenom: "The charged waves that produces the light fall on the metallic surface in the same way as ripples are made by a stone thrown into a pond ".
Research into this phenomenon could be useful in the design of metallic surfaces on a nanometric scale and on which the properties of the plasmons propagated by these surfaces, themselves, may be modified or manipulated.
This work has been led by physicist Pedro Miguel Etxenike, President of the Donostia International Physics Center, in collaboration with scientists from the CSIC, the UPV/EHU, the CIC Nanogune and the Universidad Autónoma of Madrid.
The research team has suggested baptizing the new phenomenon “the Silkin Plasmon” in recognition of the sterling work undertaken by scientist Slava Silkin, who works at the Donostia International Physics Center.
Irati Kortabitarte | alfa
Airborne thermometer to measure Arctic temperatures
11.01.2017 | Moscow Institute of Physics and Technology
Next-generation optics offer the widest real-time views of vast regions of the sun
11.01.2017 | New Jersey Institute of Technology
Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.
As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...
At TU Wien, an alternative for resource intensive formwork for the construction of concrete domes was developed. It is now used in a test dome for the Austrian Federal Railways Infrastructure (ÖBB Infrastruktur).
Concrete shells are efficient structures, but not very resource efficient. The formwork for the construction of concrete domes alone requires a high amount of...
Many pathogens use certain sugar compounds from their host to help conceal themselves against the immune system. Scientists at the University of Bonn have now, in cooperation with researchers at the University of York in the United Kingdom, analyzed the dynamics of a bacterial molecule that is involved in this process. They demonstrate that the protein grabs onto the sugar molecule with a Pac Man-like chewing motion and holds it until it can be used. Their results could help design therapeutics that could make the protein poorer at grabbing and holding and hence compromise the pathogen in the host. The study has now been published in “Biophysical Journal”.
The cells of the mouth, nose and intestinal mucosa produce large quantities of a chemical called sialic acid. Many bacteria possess a special transport system...
UMD, NOAA collaboration demonstrates suitability of in-orbit datasets for weather satellite calibration
"Traffic and weather, together on the hour!" blasts your local radio station, while your smartphone knows the weather halfway across the world. A network of...
Fiber-reinforced plastics (FRP) are frequently used in the aeronautic and automobile industry. However, the repair of workpieces made of these composite materials is often less profitable than exchanging the part. In order to increase the lifetime of FRP parts and to make them more eco-efficient, the Laser Zentrum Hannover e.V. (LZH) and the Apodius GmbH want to combine a new measuring device for fiber layer orientation with an innovative laser-based repair process.
Defects in FRP pieces may be production or operation-related. Whether or not repair is cost-effective depends on the geometry of the defective area, the tools...
10.01.2017 | Event News
09.01.2017 | Event News
05.01.2017 | Event News
16.01.2017 | Trade Fair News
16.01.2017 | Architecture and Construction
13.01.2017 | Life Sciences