chanelink logo
CHANELINK
Nederlands

Using attosecond pulses to reveal new information about the photoelectric effect

143
2024-09-02 15:22:21
Bekijk vertaling

Scientists from the Stanford National Accelerator (SLAC) laboratory of the US Department of Energy have revealed new information about the photoelectric effect using attosecond pulses: the delay time of photoelectric emission is as long as 700 attosecond, far exceeding previous expectations. The latest research challenges existing theoretical models and helps to reveal the interactions between electrons more deeply, promoting the development of technologies such as semiconductors and solar cells. The relevant paper titled 'Attested delays in X-ray molecular ionization' was published in the latest issue of the journal Nature.

The photoelectric effect refers to the phenomenon in which photons interact with molecules or atoms on a metal surface when light is irradiated, causing the metal surface to release electrons. This effect laid the theoretical foundation for quantum mechanics, but the so-called photoelectric emission delay time has always been a fiercely debated topic. The latest progress in the field of attosecond science provides an important tool for further revealing the secret of this time delay.

Research schematic diagram
In the latest study, researchers used attosecond (10 billionth of a second) X-ray pulses emitted by SLAC's linear accelerator coherent light source to ionize core level electrons and "kick" them out of molecules. Then, they used separate laser pulses to "kick" the electrons in slightly different directions based on their emission time to measure the delay time of photoelectric emission.

Research shows that this delay time is as long as 700 attosecond, and the interaction between electrons plays an important role in this delay. Researchers point out that measuring and interpreting these time delays can help better analyze experimental results, especially in fields such as protein crystallography and medical imaging where the interaction between X-rays and matter is crucial. They plan to delve deeper into the electronic dynamics within different molecular systems, further revealing new information on electronic behavior and molecular structure.

Source: Science and Technology Daily, Author: Liu Xia

Gerelateerde aanbevelingen

  • Fundamentals of Next Generation Photonic Semiconductors: Small Lasers

    This week, an illustration was published on the cover of the international journal Science, showcasing a powerful mode-locked laser emitted from a miniature photonic semiconductor.A research team led by Alireza Marandi, a professor of electrical engineering and applied physics at the California Institute of Technology, has successfully developed a conventional mode-locked laser large enough to fit...

    2023-11-13
    Bekijk vertaling

  • Unsupervised physical neural network empowers stacked imaging denoising algorithm

    In view of the reconstruction problem of stack imaging technology in noisy environment, Lin Nan's team from Shanghai Institute of Optics and Mechanics, Chinese Academy of Sciences, proposed an innovative method ProPtyNet based on unsupervised physical neural network, which is expected to be applied to chip CD measurement and defect detection. The article was published in Optics and lasers in engin...

    03-25
    Bekijk vertaling

  • Laser engraving: Researchers have created a revolutionary technology

    Recently, a group of researchers from the University of Cambridge developed an innovative method of using high-energy lasers to improve 3D printing of metals. This discovery has the potential to change the way we design and manufacture complex metal objects.3D printing has completely changed the landscape of the manufacturing industry. However, it faces obstacles, especially in terms of the charac...

    2023-11-24
    Bekijk vertaling

  • Vast's Haven-1 program has become the world's first commercial space station equipped with SpaceX Starlink lasers

    Vast's Haven-1 program will become the world's first commercial space station, equipped with SpaceX's Starlink laser terminal, providing connections to its crew users, internal payload racks, external cameras, and instruments at speeds of gigabits per second and low latency.Max Haot, CEO of Vast, said: "If you need to provide high-speed, low latency, and continuous Internet connection on the orbit...

    2024-04-10
    Bekijk vertaling

  • TRUMPF helps upgrade the automation of 3D laser processing for automotive thermoforming

    (Dechengen, Germany, March 24, 2025) - TRUMPF Group in Germany has now provided end customers with a fully automated one-stop solution for laser processing systems. With this solution, customers can not only shorten the production cycle, but also effectively reduce the cost of 3D laser material processing. Our laser equipment has excellent production efficiency. Now, through the automation upgrade...

    04-02
    Bekijk vertaling