English

Using attosecond pulses to reveal new information about the photoelectric effect

986
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
  • RAISE3D launches its innovative 3D printer series and filament series

    3D printer manufacturer Raise3D has launched a new Fused Manufacturing (FFF) 3D printer series called Pro3 HS and a supercore filament series.The Pro3 HS series is equipped with a motion control system, which improves speed, accuracy, and simplifies the manufacturing of large composite components. Raise3D's Hyper Core filament has a dense fiber core and well arranged carbon fibers, which can enha...

    2024-06-11
    See translation
  • TroGroup announces acquisition of Luxinar Ltd.

    Recently, TroGroup, a family owned laser giant operating globally in Austria, announced a major strategic move - the successful acquisition of Luxinar Ltd., a leading laser source manufacturer based in Hull, UK. This move marks a new level of TroGroup's technological leadership in the field of laser sources.Through this acquisition, Luxinar, with its approximately 200 elite team and over 25 years ...

    2024-08-03
    See translation
  • From Colored Glass Windows to Lasers: Nanogold Changes Light

    For a long time, craftsmen have been fascinated by the bright red color produced by gold nanoparticles scattered in colored glass masterpieces. The quantum origin of this optical miracle has always been mysterious, until modern advances in nanoengineering and microscopy revealed the complexity of plasma resonance.Now, researchers are preparing to push nano plasma technology, which was once used fo...

    2024-01-02
    See translation
  • The visual LiDAR fusion calibration board improves the detection accuracy of the vehicle navigation system and does not need to be adjusted before sailing

    At present, the navigation system has become an important equipment on ships, aircraft, missiles, automobiles and other navigational vehicles. Laser Doppler radar has become an important development direction in the field of velocity measurement technology because of its high accuracy, good spatial resolution and fast dynamic response. The application of the three-beam Doppler Lidar in the...

    2023-08-23
    See translation
  • The research results on the implementation of micro active vortex laser using laser nanoprinting technology are published in Nano Letters

    IntroductionVortex beams carrying orbital angular momentum (OAM) are widely used for high-throughput optical information multiplexing, and achieving on chip, small-scale vortex lasers is crucial for promoting the industrial implementation of vortex light reuse technology. Recently, Gu Min, an academician of Shanghai University of Technology, and Fang Xinyuan, an associate professor of Shanghai Uni...

    2023-10-16
    See translation