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  • Coherent light control of a metastable hidden state [Elektronski vir]
    Maklar, Julian ...
    Metastable phases present a promising route to expand the functionality of complex materials. Of particular interest are light-induced metastable phases that are inaccessible under equilibrium ... conditions, as they often host new, emergent properties switchable on ultrafast timescales. However, the processes governing the trajectories to such hidden phases remain largely unexplored. Here, using time- and angle-resolved photoemission spectroscopy, we investigate the ultrafast dynamics of the formation of a hidden quantum state in the layered dichalcogenide 1T-TaS2 upon photoexcitation. Our results reveal the nonthermal character of the transition governed by a collective charge-density-wave excitation. Using a double-pulse excitation of the structural mode, we show vibrational coherent control of the phase-transition efficiency. Our demonstration of exceptional control, switching speed, and stability of the hidden state are key for device applications at the nexus of electronics and photonics.
    Vir: Science advances [Elektronski vir]. - ISSN 2375-2548 (Vol. 9, iss. 47, [article no.] eadi466, Nov. 2023, str. 1-8)
    Vrsta gradiva - e-članek ; neleposlovje za odrasle
    Leto - 2023
    Jezik - angleški
    COBISS.SI-ID - 174196995

    Povezava(-e):

    https://www.science.org/doi/epdf/10.1126/sciadv.adi4661
    DOI

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