We study the possibility of surface plasmon polariton (SPP) pulse shape and duration manipulation on sub-picosecond timescales via a high intensity pump SPP pulse photoexciting electrons in a gold film. We present a theoretical model describing this process and show that the pump induces the phase modulation of the probe pulse leading to its compression by about 25\% and the variation of the delay between two SPP pulses up to 10 fs for the incident fluence of the pump of about 1 mJ·cm$^{−2}$.
42.65.Re Ultrafast processes; optical pulse generation and pulse compression
$^1$Department of photonics and microwave physics, Faculty of Physics, Lomonosov Moscow State University. Moscow 119991, Russia.
$^2$Russian Quantum Center, Novaya str. 100A, Skolkovo village, Odintsovo district, Moscow area, 143025 Russia.
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