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Few-Cycle Surface Plasmon Polariton Generation by Rotating Wavefront Pulses

  Articoli su Riviste JCR/ISI  (anno 2018)

Autori:  Pisani F., Fedeli L., Macchi A

Affiliazione Autori:  1) Enrico Fermi Department of Physics, University of Pisa, 56127 Pisa, Italy 2) Department of Energy, Politecnico di Milano, 20133 Milano, Italy 3) National Institute of Optics, National Research Council (CNR/INO), A.Gozzini unit, 56124 Pisa, Italy

Riassunto:  A concept for the efficient generation of surface plasmon polaritons (SPPs) with ultrashort duration close to the single-cycle limit is presented. The scheme is based on grating coupling and laser pulses with wavefront rotation (WFR), so that the resonance condition for SPP excitation is satisfied only for a time window shorter than the driving pulse. The feasibility and robustness of the technique is investigated by means of simulations with realistic parameters. In optimal conditions, we find that a 29.5 fs pulse with an 800 nm wavelength can excite SPPs with <4 fs duration (∼1.5 laser cycles) and a peak field amplitude ∼2.7 times the peak value for the laser pulse.

Rivista/Giornale:  ACS PHOTONICS
Volume n.:  5      Pagine da: 1068  a: 1073
Parole chiave: plasmonics - ultrafast optics - rotating wavefront - few-cycle pulses
DOI: 10.1021/acsphotonics.7b01347

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