New generation organic molecules set a new record of light transmission capacity.

An international team of scientists from Washington State University, USA, University of Leuven, Belgium and the Chinese Academy of Sciences has synthesized and tested successfully new generation of optical molecules. ability to download extremely fast light.

These new organic molecules known as chromophores can interact with light more strongly than any molecule that has been tested before. This helps it as well as other organic molecules synthesized based on this principle to become the first choice in its application to areas related to optical technology such as optical switches, Internet-connected devices, optical memory systems and holographic techniques. These new molecules were synthesized by Chinese chemical experts, judged on theoretical calculations by a Washington State University physics professor and its optical properties were accredited by chemists in Belgium.

Mark Kuzyk, a professor of physics at Washington State University, said that ' these molecules work better than any of the molecules that have been measured before '.

The new findings of this international research group were published in the January 1 issue of Optical Review

Mr. Mark Kuzyk, Professor of Physics at Washington State University (photo: Washington State University) Since optical technology has a dominant role in the 1970s, experts in this field have not stopped Research to improve materials used for light treatment. In 1999, Mr. Kuzyk discovered the limit that light could interact with matter. He also pointed out that all organic molecules tested at the time were below this limit. Even for the best molecules it is lower than 30 ' optical power ', as he calls it, compared to the theoretical ability. The molecules described in the report published in the journal Optical have surpassed the long-standing limit and they are 50% more effective. This means that these molecules are extremely efficient at converting light energy into usable forms of matter.

Earlier this year, Professor Kuzyk and his two colleagues published a guide describing molecular structures that proved very effective in interacting with light. Mr. Koen Clays, professor of chemistry at Leuven University, Belgium, pioneered the use of experiments called hyper-Rayleigh scattering to measure the intensity of a molecule interacting with light. In the process of calculating the molecules of chemists from around the world sent to him, Professor Clays realized that some of the molecules tested had met the requirements set out in the professor's instructions. Kuzyk. Among them, seven molecules provided by chemical experts of the Chinese Academy of Sciences are the most promising. During the study of these molecules, Xavier Perez-Moreno discovered that 2 out of 7 molecules have a strong interaction with light.

Mr. Perez-Moreno said ' the results we have are exactly the same as Kyzyk's theoretical figures. We used quantum limits to find a better approach to the interaction of non-linear light and the desire to find general principles for the interaction of light with matter, here. obviously an ambitious goal. Last summer, we have established some principles of quantum limit structure .

These new quantum limit rules require a molecular structure that can increase the characteristic known as ' intrinsic polarized '. This characteristic reflects how the free electrons in a molecule become distorted when the molecule acts as a medium for two photons to merge into one. This reaction is the basic principle of an optical switch. Researchers in this field all over the world praised this groundbreaking discovery.

In these new designs, each molecule has an element for electrons at one end and the component receives electrons at the other end. In the middle it is the ' bridging ' part of the molecule. All previous attempts to increase interaction with light focused on making the " transient " part of the bridge thereby allowing electrons to move easily from head to head. Kuzyk's calculations have shown that a bumpy structure is good in improving interactivity with light; Professor Clays discovered that Zhao's molecular structure really met this. This is proved by the calculations of his group. Quantum mechanics will explain the behavior of electron particles in this case.

Kuzyk explained ' when you watch an electron, you definitely don't think of it as a small ball moving around. But it really is. Electrons move everywhere at the same time. When electrons spread everywhere, it might be hindering itself. Therefore, by adding speed pumps to the molecules, we can make them converge in certain positions and we will prevent it from obstructing itself . '

The molecules described in the recent report have only one speed pump. Now researchers claim that these theoretical designs work well and they are focusing on figuring out how to add more speed pumps.

Kuzyk adds that 'according to my calculations, the more molecules in the molecule, the better the molecule interacts with light'.

He said that if used in optical switches or other products, these molecules need to be attached to a transparent polymer chain that has the same structural properties as the ability to form films. thin, fibrous or other shapes and can be used to coat circuits or chips.

Kuzyk is an outstanding professor of Boeing's cave and is teaching at Washington State University's department of physics and astronomy. Clays is a professor of chemistry at the University of Leuven, Belgium and an adjunct professor at Washington State University. Perez-Moreno is studying for a doctorate. Zhao is an assistant professor at the Institute of Physical and Chemical Engineering of the Chinese Academy of Sciences in Beijing. Their work is funded by the University of Leuven, Belgium, the Belgian government, the Scientific Research Fund in the Flanders region (northeast of France and Belgium), the US National Science Foundation and the base. Wright-Paterson army.

Moc Nhat