繁体中文

Using attosecond pulses to reveal new information about the photoelectric effect

826
2024-09-02 15:22:21
查看翻譯

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

相關推薦
  • Researchers use desktop laser systems to generate ultrafast electrons

    In a mass particle accelerator, subatomic particles are accelerated to ultrahigh speeds that are comparable to the speed of light towards the target surface. The accelerated collision of subatomic particles produces unique interactions, enabling scientists to gain a deeper understanding of the fundamental properties of matter.Traditionally, laser based particle accelerators require expensive laser...

    2024-03-14
    查看翻譯
  • Korean researchers use laser ablation to create deformable micro supercapacitors

    Recently, a research team from the Korea Institute of Industrial Technology and POSTECH University successfully utilized laser sintering pattern technology to create a deformable micro supercapacitor (MSCs), specifically designed to provide energy storage solutions for soft electronic devices. This breakthrough meets the urgent need for efficient energy storage systems in stretchable devices in...

    2024-05-30
    查看翻譯
  • The fiber laser system overcomes outdated issues through a PC based EtherCAT control platform

    In order to maintain relevance and success, companies with a long history must respect their past while not ignoring the future. This is the method adopted by Cincinnati Corporation (CI), a metal processing machinery manufacturer based in Harrison, Ohio, since its establishment in the late 1890s.The company is carefully considering technological changes. Incorrect selection of control hardware, ne...

    2024-05-25
    查看翻譯
  • Emerging laser technologies for precise manufacturing of multifunctional nanomaterials and nanostructures

    The use of photons to directly or indirectly drive chemical reactions has fundamentally changed the field of nanomaterial synthesis, leading to the emergence of new sustainable laser chemistry methods for manufacturing micro - and nanostructures. The incident laser radiation triggers complex interactions between chemical and physical processes at the interface between solid surfaces and liquid or ...

    2024-08-05
    查看翻譯
  • GE Additive has been renamed Colibrium Additive, continuing to lead the additive manufacturing industry

    In April 2024, GE Additive was renamed Colibrium Additive. Colibrium Additive (formerly GE Additive) is a subsidiary of GE Aerospace Propulsion and Additive Technology (PAT) and was established at the end of 2016. Nowadays, it is a trusted partner and manufacturer of industrial metal 3D printers and metal powders, as well as a service provider for industrial metal 3D printers and metal powders. It...

    2024-04-30
    查看翻譯