English

Using attosecond pulses to reveal new information about the photoelectric effect

1125
2024-09-02 15:22:21
See translation

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

Related Recommendations
  • Beyond Limits: The Amazing Power of Water in Laser Development

    Water helps to generate ultra continuous white lasers with an extremely wide wavelength range.Researchers have made significant progress in creating ultra wideband white laser sources, which have a wide wavelength range from ultraviolet to far-infrared. These advanced lasers are used in various fields, including imaging, femtosecond chemistry, telecommunications, laser spectroscopy, sensing, and u...

    2024-02-26
    See translation
  • The birth of multi photon 3D laser printing technology: printing millions of particles within 1 second

    Multi photon 3D laser printing technology, as a disruptive micro manufacturing technology, is facing two major challenges: speed and material compatibility. However, the latest research has made breakthrough progress, successfully increasing printing speed tenfold while maintaining excellent detail accuracy.In this remarkable study, scientists abandoned the traditional single beam printing method ...

    2024-04-19
    See translation
  • E&R Engineering launches a mold cutting solution at Semicon SEA 2024

    Advanced laser and plasma solution provider E&R Engineering Corp. has confirmed that they will participate in the Semiconductor SEA 2024 event held in Kuala Lumpur, Malaysia. With 30 years of focus in the semiconductor industry, E&R has developed a wide range of plasma and laser technologies. At Semicon SEA 2024, they will showcase their latest solutions, including:Plasma Cutting - Small M...

    2024-05-20
    See translation
  • TYVOK Releases K1: The Ultimate 100W CO₂ Laser Engraver for Makers and Designers

    TYVOK, industry leaders in laser engraving technology, just announced the launch of TYVOK K1, a modular CO₂ laser engraver engineered to give makers, designers, schools, and small businesses industrial power with intuitive design and user-friendly operation. TYVOK K1 blends a true 100W optical CO₂ laser engine with precision motion control, a rigid, level platform, and professional-grade safety sy...

    09-16
    See translation
  • The First Ultra Fast Laser Application Development Conference was held in Songshan Lake, Dongguan

    The First Ultra Fast Laser Application Development Conference was held in Songshan Lake, Dongguan. The first advanced attosecond laser facility in China will have 8 beam lines landing in Dongguan.Laser enjoys the reputation of being the "fastest knife," "most accurate ruler," and "brightest light," among others. As an important research direction in the laser field, ultrafast laser has always been...

    2023-10-28
    See translation