Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Broadband and Ultrathin Polarization Manipulators Developed

04.12.2014

A research team in South Korea has developed a technology that can manipulate a polarized light in broadband operation with the use of a metamaterial.

Professor Bumki Min from the Department of Mechanical Engineering at Korea Advanced Institute of Science and Technology (KAIST) has led the research and it is expected that this technology will lead to a development of broadband optical devices that can be applied to broadband communication and display.


Concept of Broadband and Ultrathin Polarization Manipulators

Copyright : Korea Advanced Institute of Science and Technology

When an object or its structure is analyzed by using a polarized light such as a laser, the results are generally affected by the polarization state of the light. Therefore, in an optics laboratory, the light is polarized with various methods.

In such cases, wave plates or photoactive materials are usually implemented. However, the performance of these devices are vastly dependent on the wavelength, and so they are not suitable to be used as a polarizer especially in broadband.

There were many attempts to make artificial materials that are very photoactive by using matematerials which have a strong resonance. Nonetheless, because the materials had an unavoidable dispersion in the resonance frequency, they were not adequate for a broadband operation.

Professor Min’s research team arranged and connected helical metamaterials that are smaller than the wavelength of a light. They theoretically and experimentally verified that a polarized light can be constantly rotated regardless of the wavelength by super thin materials that has thickness less than one-tenth of the wavelength of the light. The experiment to confirm the theory was done in the microwave band.

Broadband polarized rotational 3D metamaterials were found to be rotating the polarized microwave within the range of 0.1 GHz to 40GHz by 45 degrees regardless of its frequency. Such nondispersive property is quite unnatural because it is difficult to find a material that does not change in a wide band.

Along with this, the research team materialized the broadband nondispersive polarized rotational property by designing the metamaterial in a way that it has chirality, which determines the number of rotation proportional to the wavelength.

Professor Min said, “As the technology is able to manipulate ultrathin polarization of light in broadband, it will lead to the creation of ultra-shallow broadband optical devices.”

Sponsored by the Ministry of Science, ICT and Future Planning and the National Research Foundation of Korea, this research was led by a PhD candidate, Hyun-Sung Park under the guidance of Professor Min. The research finding was published online in the November 17th issue of Nature Communications.

Lan Yoon | ResearchSEA
Further information:
http://www.kaist.ac.kr/_prog/_board/?code=ed_news&mode=V&no=26522&upr_ntt_no=26522&site_dvs_cd=en&menu_dvs_cd=0601
http://www.researchsea.com

More articles from Information Technology:

nachricht Defining the backbone of future mobile internet access
21.07.2017 | IHP - Leibniz-Institut für innovative Mikroelektronik

nachricht Researchers create new technique for manipulating polarization of terahertz radiation
20.07.2017 | Brown University

All articles from Information Technology >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Manipulating Electron Spins Without Loss of Information

Physicists have developed a new technique that uses electrical voltages to control the electron spin on a chip. The newly-developed method provides protection from spin decay, meaning that the contained information can be maintained and transmitted over comparatively large distances, as has been demonstrated by a team from the University of Basel’s Department of Physics and the Swiss Nanoscience Institute. The results have been published in Physical Review X.

For several years, researchers have been trying to use the spin of an electron to store and transmit information. The spin of each electron is always coupled...

Im Focus: The proton precisely weighted

What is the mass of a proton? Scientists from Germany and Japan successfully did an important step towards the most exact knowledge of this fundamental constant. By means of precision measurements on a single proton, they could improve the precision by a factor of three and also correct the existing value.

To determine the mass of a single proton still more accurate – a group of physicists led by Klaus Blaum and Sven Sturm of the Max Planck Institute for Nuclear...

Im Focus: On the way to a biological alternative

A bacterial enzyme enables reactions that open up alternatives to key industrial chemical processes

The research team of Prof. Dr. Oliver Einsle at the University of Freiburg's Institute of Biochemistry has long been exploring the functioning of nitrogenase....

Im Focus: The 1 trillion tonne iceberg

Larsen C Ice Shelf rift finally breaks through

A one trillion tonne iceberg - one of the biggest ever recorded -- has calved away from the Larsen C Ice Shelf in Antarctica, after a rift in the ice,...

Im Focus: Laser-cooled ions contribute to better understanding of friction

Physics supports biology: Researchers from PTB have developed a model system to investigate friction phenomena with atomic precision

Friction: what you want from car brakes, otherwise rather a nuisance. In any case, it is useful to know as precisely as possible how friction phenomena arise –...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Closing the Sustainability Circle: Protection of Food with Biobased Materials

21.07.2017 | Event News

»We are bringing Additive Manufacturing to SMEs«

19.07.2017 | Event News

The technology with a feel for feelings

12.07.2017 | Event News

 
Latest News

NASA looks to solar eclipse to help understand Earth's energy system

21.07.2017 | Earth Sciences

Stanford researchers develop a new type of soft, growing robot

21.07.2017 | Power and Electrical Engineering

Vortex photons from electrons in circular motion

21.07.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>