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Excelitas Technologies Corp. - X-Cite Vitae LB 11/24

Dark Autoionizing States Enhance EUV Laser Power

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JOEL WILLIAMS, ASSOCIATE EDITOR
[email protected]

Researchers led by Tsuneyuki Ozaki and François Légaré at the Institut national de la recherche scientifique (INRS) in Quebec have developed a method that could bring extreme ultraviolet (EUV) femtosecond lasers out of synchrotron facilities and onto the optical table. The technique, based on high-order harmonic generation (HHG), enhances the power of a laser source emitting EUV light pulses by a factor of 10. The underlying mechanism involves the role of dark-autoionizing states through coupling with other pertinent electronic states. In addition to providing an...Read full article

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    Published: April 2023
    Glossary
    quantum
    The term quantum refers to the fundamental unit or discrete amount of a physical quantity involved in interactions at the atomic and subatomic scales. It originates from quantum theory, a branch of physics that emerged in the early 20th century to explain phenomena observed on very small scales, where classical physics fails to provide accurate explanations. In the context of quantum theory, several key concepts are associated with the term quantum: Quantum mechanics: This is the branch of...
    high harmonic generation
    High harmonic generation (HHG) refers to a nonlinear optical process in which intense laser light interacts with a gaseous medium, typically an atom or a molecule, to produce harmonics of the incident laser frequency. The harmonics generated in this process have frequencies that are multiples of the original laser frequency, and they are in the extreme ultraviolet (XUV) or soft x-ray range of the electromagnetic spectrum. The HHG process usually involves a strong laser field ionizing the...
    noble gas
    A monatomic, chemically inert gas such as argon, neon, krypton and xenon.
    extreme ultraviolet
    Extreme ultraviolet (EUV) refers to a specific range of electromagnetic radiation in the ultraviolet part of the spectrum. EUV radiation has wavelengths between 10 and 124 nanometers, which corresponds to frequencies in the range of approximately 2.5 petahertz to 30 exahertz. This range is shorter in wavelength and higher in frequency compared to the far-ultraviolet and vacuum ultraviolet regions. Key points about EUV include: Source: EUV radiation is produced by extremely hot and energized...
    Research & TechnologyLasersOpticsquantumspectroscopyhigh harmonic generationdark autoionizing statesnoble gasextreme ultravioletEUVINRSInstitut National de la Recherche ScientifiqueAmericasLight SourcesTechnology News

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