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We report the first ultrafast mid-infrared (IR) spectroscopy in monolayer MoS2. The observed mid-IR dynamics show multiple, yet broadened absorption, indicating the predominant intraexcitonic transition from the ground to the higher-lying excitonic states.
We report the first measurement of ultrafast mid-infrared (IR) spectroscopy in monolayer MoS2. The observed mid-IR dynamics shows large photo-excited absorption, indicating the predominant intraexcitonic transition from the ground to the higher-lying excitonic states.
We present ultrafast optical modulation of plasmons in a topological insulator Bi2Se3 micrio-ribbon array. Unprecedented giant modulation depth up to 2,400 % is obtained with very low fluence of optical control pulse.
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