Scientists at the University of Oviedo and the Research Center for Nanomaterials and Nanotechnology have discovered a way to control the frequency of light at the nanometer level by inserting sodium atoms in so-called van der Waals materials. This progress can be applied to information technology and highly sensitive biosensors.
survey mint Due to the use of graphene, boron nitride, or molybdenum trioxide and other sheet-like structured nanomaterials, in recent years (100 times the thickness of human hair) has made considerable progress. Van der Waals.
One of the main disadvantages of this nanlight technology application is the limited frequency range of each material, but now an international team led by scientists from all over the world University of Oviedo with Nanomaterials and Nanotechnology Research Center (CINN-CSIC) They found a possible solution.
Researchers have found an effective way to control the frequency of nano-scale confined light by inserting atoms such as sodium in van der Waals materials.
The discovery was published in the journal Natural materials, Will make progress in the development of compact photonic technologies, such as highly sensitive biosensors or nanoscale information and communication technologies.
Specifically, new technologies can extend the so-called operating frequency range. Polarin, Is a kind of light coupled with network vibration. To this end, basic atoms such as sodium and other basic atoms such as calcium or lithium are inserted into the layered structure of van der Waals crystals. Vanadium pentoxide, Allowing modification of its atomic bonds and therefore its optical properties.
He said: “Considering the number of atoms that may be embedded and the materials we have, it is very likely that in a short time we can excite nano-light in the entire infrared spectrum.” Pablo Alonso González, Is one of the co-authors of the University of Oviedo.
New information technology
He added: “From a technical point of view, this discovery is very important because it makes it possible to manufacture equipment for future information and communication technologies.” Javier Martin Sanchez, Another researcher.
“In addition, the two authors jointly pointed out that “this work is also very relevant to other areas of knowledge, such as biology (with new sensors)”, Javier Tapoada Gutierrez ÿ Gonzalo Alvarez Perez, And came to the conclusion: “Nanolight interacts strongly with molecules at certain frequencies in the infrared, which we could not achieve before. Now we can use this technology to detect many other molecules.”
Scientists from other national centers also participated in this study (Dip, CIC nanoGUNE with Basque State University) And international (Chinese Academy of Sciences, Case Western Reserve University, Austrian Institute of Technology, Paris Materials Center and University of Tokyo).
Javier Taboada-Gutiérrez, Gonzalo Álvarez-Pérez, Duan Jiahua, Ma Weiliang, Kyle Crawley, Ivan Pérez Lieto, Andre Pailingin, Marta Otley, Helena Volkova, Kenta Kimura, Takeshi Kimura, M.-H. Berger, Li Shaojuan, Bao Qiaoliang, Gao Xuan PA, Ion Aria, Alexei Nikitin, Reina Hillenbrand, Javier Martin Sanchez and Pablo Alonso Gang Saras. “Broad-spectrum tuning of ultra-low loss polaron in van der Waals crystal by intercalation method” Natural materials, 2020. DOI: 10.1038/s41563-020-0665-0.