Presentation Information

2:30 PM - 2:45 PM JST(5:30 AM - 5:45 AM UTC)

[11p-C213-3]Sub-10fs Time-Resolved ARPES via EUV Pulse Characterization Using Momentum-Resolved Volkov Sidebands

〇Takuya Okamoto¹, Ryo Yoshioka^1,2, Kohei Nagai¹, Yasushi Shinohara¹, Yoji Kunihashi¹, Hiroki Hibino³, Ikufumi Katayama², Jun Takeda⁴, Haruki Sanada¹, Katsuya Oguri¹ (1.NTT BRL, 2.YNU, 3.K.G., 4.SIT)

Keywords:

Pulse compression,Pulse characterization,Tr-ARPES

We developed a time- and angle-resolved photoemission spectroscopy (Tr-ARPES) system with sub-10 fs temporal resolution to investigate ultrafast coherent electron dynamics, including light-field-driven phenomena. The pump pulses were individually compressed to 7.4 fs using a multiple-plate continuum compressor, which is advantageous for enabling a more compact pump–probe beamline design. The extreme-ultraviolet (EUV) high-harmonic probe pulses were characterized through photoelectron XFROG based on laser-induced Volkov replica bands on multilayer WSe2. The duration of EUV pulses was reconstructed as 5.8 fs. These results demonstrate the feasibility of Tr-ARPES with sub-10fs temporal resolution and provide a pathway toward direct observation of coherent electron dynamics in momentum space.

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