Photoemission, absorption, scattering (1)

[LSC3-03(Invited)] Time- and angle-resolved photoemission spectroscopy for nonequilibrium excitonic state in bulk WSe₂

*Katsuya Oguri¹, Ryo Yoshioka^1,2, Kohei Nagai¹, Yashushi Shinohara¹, Takuya Okamoto¹, Yoji Kunihashi¹, Keiko Kato³, Hiroki Mashiko⁴, Yoshiaki Sekine¹, Hiroki Hibino⁵, Ikufumi Katayama², Jun Takeda², Haruki Sanada¹ (1. NTT Basic Research Labs., NTT Corporation, 2. Yokohama National University, 3. Nagoya University, 4. The University of Tokyo, 5. Kwansei Gakuin University)

We report an observation of the dynamical behavior of exciton generated at the K point during the optical excitation and the intervalley scattering in layered 2H- WSe₂ by using Tr-ARPES with 30-fs near infrared pump pulse.