chanelink logo
CHANELINK
Polski

Using attosecond pulses to reveal new information about the photoelectric effect

208
2024-09-02 15:22:21
Zobacz tłumaczenie

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

Powiązane rekomendacje

  • BenQ Launches V5000i 4K RGB Laser TV Projector

    Display solution brand BenQ recently launched the 4K RGB laser TV projector V5000i.The V5000i focuses on providing the pinnacle of innovation, unparalleled color accuracy, and excellent audio quality, elevating the home theater world to unprecedented heights. It is the perfect replacement for large screen televisions, particularly suitable for well lit spaces such as spacious living areas, "the co...

    2023-10-10
    Zobacz tłumaczenie

  • The team of researcher Wei Chaoyang of Shanghai Optical Machinery Institute has realized the manufacture of fused quartz components with high resistance to UV laser damage

    Recently, a team led by researcher Zhaoyang Wei of the Precision Optics Manufacturing and Testing Center of the Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, has realized the manufacture of fused quartz components with high resistance to UV laser damage based on the defect characterization and removal process of CO2 laser. The research is published in Light: Advance...

    2023-09-11
    Zobacz tłumaczenie

  • Developing a concentration independent pressure sensing method for high-temperature combustion diagnosis

    Recently, a research group led by Professor Gao Xiaoming and Professor Liu Kun of the Chinese Academy of Sciences Hefei Institute of Physical Sciences developed a concentration independent pressure sensing method based on two-color laser absorption spectrum for high-temperature combustion diagnosis.The research findings are published in Optics Letters.Aircraft engines are developing towards high-t...

    2024-03-08
    Zobacz tłumaczenie

  • Sivers Photonics has received a $1 million order for advanced optical sensing products in fields such as LiDAR and industrial applications

    Sivers Semiconductors AB announced that its subsidiary Sivers Photonics has received a new order worth $1 million for advanced optical sensing products from three customers in the fields of LiDAR, Medical, and Industrial.In the first half of the fourth quarter of 2023, new orders were received from several US clients, which will lead to the manufacturing of advanced lasers and optical amplifiers f...

    2023-11-30
    Zobacz tłumaczenie

  • An optical display technology based on mechanical optical mechanism

    The optical properties of afterglow luminescent particles in mechanical quenching and mechanical luminescence have aroused great interest in various technological applications. However, for specific photon applications, clearer explanations are needed for these unusual events.Recently, scientists from Pohang University of Science and Technology have designed an optical display technology with ALP ...

    2024-03-12
    Zobacz tłumaczenie