Electronics

Scientists have achieved a seemingly unattainable energy transition

A group of scientists from Basel and Bochum have used laser light to successfully perform energy transitions that are clearly unattainable with artificial atoms.

The team of scientists became the first team to use a radiant Auger process to specifically excite energy transitions that seemed impossible with artificial atoms using laser light.

The experimental ultra-high purity semiconductor sample was created by Dr. Julian Ritzman. Ruhr University Bochum, Under the supervision of Dr. Arne Ludwig, Chair of Applied Solid State Physics, led by Professor Andreas Wick. The measurement is University of Basel, Run by Dr. Clements Spinler, Liang Zai, Jean Nguyen, and Dr. Matthias Reble, a group led by Professor Richard Warburton.

The radiative Auger process consists of electrons that fall from high energy levels to low energy levels, resulting in the release of energy, partly in the form of light and partly by transferring it to another electron. Artificial atoms are narrowly defined regions within semiconductors that may one day form the basis of quantum communication. The findings are described online in Nature Communications on November 12, 2021, by a joint team of the University of Basel and Ruhr-University of Bochum and colleagues of Munster and Wroclaw.

Electrons change energy levels

An atom is composed of an atomic nucleus and electrons moving in the atomic nucleus. These electrons can take different energy levels. For example, an electron that is more strongly bonded to a nucleus, that is, an electron that is closer to the nucleus, has lower energy than an electron that is farther from the nucleus. However, electrons cannot assume any energy level, only specific levels.

if Electronic For example, you can acquire energy by absorbing light particles, photons, and raise it to higher energy levels. On the other hand, when an electron falls to a lower energy level, energy is released. This energy can be emitted in the form of photons. However, it can also be transferred to one of the other electrons. In this particular case, only part of the energy is emitted as light and the rest is absorbed by other electrons. This process is known as the radiative Auger process.

Perform unique energy transitions with two lasers

By exposing light particles, electrons can be lifted to higher energy levels. However, it can also be stimulated to emit energy by incident light particles. The energy of the incident light particle must always correspond exactly to the difference between the two energy levels at which the electron travels. The researchers used two lasers. One moved electrons between low and high energy levels, and the other moved electrons between high and medium energy levels. This intermediate energy level corresponds to the non-equilibrium level. That is, movement to intermediate levels would not exist without the radiative Auger process.

In addition, no transition between low and medium energy levels should have occurred because the associated light was not emitted. However, this seemingly impossible transition was successful due to the energy transfer from one electron to another in the radiative Auger process.

https://www.innovationnewsnetwork.com/scientists-have-achieved-a-seemingly-unattainable-energy-transition/16114/?utm_source=rss&utm_medium=rss&utm_campaign=scientists-have-achieved-a-seemingly-unattainable-energy-transition Scientists have achieved a seemingly unattainable energy transition

Back to top button