chanelink logo
CHANELINK
Español

Using attosecond pulses to reveal new information about the photoelectric effect

141
2024-09-02 15:22:21
Ver traducción

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

Recomendaciones relacionadas

  • Researchers propose NeuFlow: an efficient optical flow architecture that can solve high-precision and computational cost issues

    Real time and high-precision optical flow estimation is crucial for analyzing dynamic scenes in computer vision. Although traditional methods are fundamental, they often encounter issues with computation and accuracy, especially when executed on edge devices. The emergence of deep learning has driven the development of this field, providing higher accuracy, but at the cost of sacrificing computati...

    2024-03-23
    Ver traducción

  • 10.30 Shenzhen Munich South China Laser Exhibition awaits you

    The Munich South China Laser Exhibition is about to open!As a member exhibition of the South China International Intelligent Manufacturing, Advanced Electronics, and Laser Technology Expo (referred to as "LEAP Expo"), it will be held from October 30 to November 1, 2023 at the Shenzhen International Convention and Exhibition Center (Bao'an New Hall) in conjunction with the Munich South China Elect...

    2023-10-26
    Ver traducción

  • Germany has developed direct laser welding technology to achieve adhesive free connection from fiber to chip

    Recently, researchers and their partners from the Fraunhofer Institute for Reliability and Microstructure (IZM) in Germany announced the successful development of a laser welding technology that can efficiently fix optical fibers onto photonic integrated circuits (PICs) without the need for adhesive bonding.This technology is developed in response to biophoton sensing technology, mainly utilizing ...

    2023-08-22
    Ver traducción

  • A replica of an arcade made with a 3D printer in the 1970s

    A game museum has 3D printed a replica of a historic arcade computer space. The arcade museum in Stroud, Gloucestershire lacks the first commercial arcade video game. They collaborated with Heber company to create a real replica. Neil Thomas, the director of the arcade museum, said that because it is a replica, not an original, they are not "afraid" of letting people play with it.A spokesperson...

    2024-05-29
    Ver traducción

  • Measuring invisible light through an electro-optic cavity

    Researchers have developed a new experimental platform that can measure the light wave electric field captured between two mirrors with sub periodic accuracy. This electro-optical Fabry Perot resonant cavity will achieve precise control and observation of the interaction between light and matter, especially in the terahertz (THz) spectral range. The research results were published in the journal "...

    02-19
    Ver traducción