Dortmund physicist decipher secrets of exciton dynamics!
Dortmund physicist decipher secrets of exciton dynamics!
Dortmund, Deutschland - Research on excitons, quasi -parts bonds made of negatively charged electrons and positively invited holes in semiconductors has made great progress in recent years. A new project at the Technical University of Dortmund aims to better understand the behavior of these exzitons, as they are better understood as they are a central role in the energy transport of Play optoelectronic components and in the development of quantum technology applications.
Traditionally, excitons and their properties were examined by spectroscopy techniques, which mainly analyzed linear reactions. However, the Dortmund researchers have focused on deciphering non -linear reactions in excitement dynamics and achieving impressive results. They have discovered that the optical properties of excitons scale depending on the strength of the suggestion and that these non -linear effects are also important in other areas, such as acoustics, for example in electrical guitars.new knowledge of exciton dynamics
In the course of their studies, the physicists used time -solved optical spectroscopy to observe the non -linear effects of the excitons. A Terahertz field was used to examine specific distortions that behave differently in excitons than with free electrons. The researchers were able to gain a wide range of knowledge about the dynamics of excitons in copper oxide (CU2O), in particular that Exzitons have already been created a few picoseconds after the optical generation of free electrons and holes.semiconductor nanoparticles and their properties
Another important field of research is covered by the Technical University of Berlin , where the unique optical and electronic properties of semiconductor nanoparticles are examined. These properties are the result of strong spatial restrictions and enable an adaptation of the electronic structure by variation in size and shape of the particles. This leads to high non -linear coefficients that can be used for applications in optical data storage and biological cell formation.
The nanoparticles generate excitons, the interactions of which significantly influence the diffusion and mobility behavior. Special attention is paid to the temperature and size-dependent emission satellites, which could be demonstrated by photoluminescent spectra. Furthermore, it was shown that the emission of CDSE nanoplätchen can be modified by electrical fields, which opens up new possibilities for the development of photonic applications.
Exziton traps and quantum processing
A promising approach to research into exploring excitons brings the ETH Zurich . These traps are based on molybdenum diselenid, which is placed between two insulators. Creating a voltage creates a varied electrical field that effectively captures excitons. These traps open up new perspectives in quantum information processing.
The excitons are electrically neutral, but can be polarized by electrical fields, which leads to a dipolar behavior. Experimental evidence was provided by laser light from different wavelengths and measurements of light reflection. The results show that electrical fields quantize the movement of the Exzitons and only take certain energy states, similar to electrons in an atom.
This research work on excitons and semiconductors contribute to further development of future technologies and provide important findings for basic research in the areas of optoelectronics and quantum computing.
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| Ort | Dortmund, Deutschland |
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